Pollucite

(Cs,Na)2Al2Si4O12 2H2O; cesium sodium aluminum silicate hydrate (analcime group zeolite) · Mohs 6.5 · Cubic · Third Eye Chakra

The stone of pollucite: meaning, mineralogy, and somatic practice.

DisciplinePatience & EnduranceEmotional BalanceProtection & Grounding

This page documents traditional and cultural uses of pollucite alongside emerging research on tactile grounding objects. Crystalis does not claim that pollucite treats, cures, or prevents any medical condition. For mental health concerns, consult a qualified professional.

Crystalis Editorial · 40+ Years · Herndon, VA · 12 peer-reviewed sources

Origins: Italy, USA (Maine), Afghanistan

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Pollucite

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Protocol

The Cesium Vault

Cubic cesium-bearing zeolite with the lowest leach rate of any known mineral -- what is held inside this stone stays held, modeling containment for what you carry.

5 min

1
Hold the pollucite in both hands. This cubic cesium-bearing zeolite has the lowest cesium leach rate of any known mineral -- what goes into pollucite stays in pollucite. Feel the stone's weight (specific gravity 2.85-2.94) and let it model containment. Some things are meant to be held, not released. Breathe in for 5, out for 7.
2
Place the stone at your solar plexus. The Ia-3d space group creates a structure of extraordinary symmetry -- 48 symmetry operations in the cubic system. Every direction you approach this mineral, it presents the same face. Ask: what in me is consistent regardless of who is looking? Breathe into that consistency for 60 seconds.
3
Move the stone to your right hand and squeeze firmly. Pollucite is hardness 6.5 -- it can take the pressure. The cesium atoms inside the zeolite cages are physically trapped, not chemically bonded in a way that allows easy escape. Ask: what am I holding that I have been told I should release but that actually belongs inside me? Not everything needs to leave.
4
Hold the stone against the base of your skull. The hydrated formula ((Cs,Na)2Al2Si4O12 . 2H2O) means water is structural, not incidental. Some of what you carry is not excess -- it is architecture. Breathe and let your body distinguish between burden and structure.

Continue in the full protocol below.

tap to flip for protocol

Depletion is often less dramatic than it looks. The self may still function, still answer, still perform, but the rarer elements that keep life feeling balanced have started thinning out in a way the body notices long before the mind does.

Pollucite is persuasive because it is all about storage. A pale pegmatitic mineral carrying cesium, it feels less like display than like reserve, a place where something uncommon is kept concentrated instead of being wasted through constant diffusion. Pollucite matters for energy management and emotional economy. The lesson is not simply to rest more. It is to stop spending what was rare in the first place.

What Your Body Knows

Nervous system states

Touching Pollucite gives the body a specific set of data, and that data can alter state. For Pollucite, the key region is usually the brow and wrists. The nervous system function at stake is orientation under stress: how the body decides where to concentrate attention, where to soften, and how much boundary to maintain.

A useful bridge comes from the stone's physical properties rather than from abstraction alone. its pale cubic to massive form and unusual cesium content convey reserve and storage, supporting states of depletion and overspending. When the specimen is placed on the relevant body region, sensation arrives through ordinary channels such as coolness, pressure, texture, reflected light, or visible pattern.

Those cues can narrow a diffuse state into a more local one. The chest may feel less scattered once weight is centralized. The throat may work more clearly once a line of attention is established.

The hands may stop searching once a repeating texture gives them something definite to track. In clinical terms, the stone functions as structured sensory input. In poetic terms, it gives the body a shape to lean against.

The effect is not magic and it is not proof of biochemical transfer. It is a somatic mechanism in which a material object organizes attention and therefore changes how arousal is carried. Pollucite works most clearly with states that need a boundary, an organizing pattern, or a calmer route between sensation and meaning.

dorsal vagal

Freeze / Shutdown

When energy feels stuck and the body won't respond. Pollucite is placed on the body as an anchor point. Your shoulders drop. Your breath becomes shallow and barely audible. A heaviness settles in your limbs. This is dorsal vagal shutdown; your oldest survival circuit pulling you toward stillness, collapse, disconnection from sensation.

sympathetic

Dorsal vagal (feeling trapped / constricted by circumstances):

Pollucite's crystal structure is a cage that holds the largest common alkali metal (cesium) within a framework too small for it to escape. For nervous systems overwhelmed by the sheer volume of inputs

sympathetic

Overstimulation / Agitation

When the system is running too hot; racing thoughts, restless limbs, inability to settle. Your chest tightens. Your jaw clenches. Your breath moves higher, shallower, faster. This is sympathetic activation; your body mobilizing for fight or flight, muscles tensing, heart rate rising.

dorsal vagal

caged

Sympathetic activation (fear of loss / inability to hold onto things):

ventral vagal

Regulated Presence

When the body finds its resting rhythm. Pollucite held or placed becomes a touchpoint for presence. Your chest opens. Your jaw unclenches. Your breath deepens into your belly. This is ventral vagal regulation; your body finding safety, social connection, steady presence.

sympathetic

Pollucite has the lowest cesium leach rate of any known mineral

Mixed state (rare and valuable but unrecognized): Pollucite is one of the rarest gem minerals on Earth, the primary ore of cesium, and structurally extraordinary; yet most people have never heard of it. For nervous systems navigating the dissonance of being valuable but unrecognized (common in gifted individuals, neurodivergent people, or anyone whose worth is not easily categorized by conventional metrics), pollucite validates the experience: rarity does not require recognition to be real. State shift: dissonance between self-worth and external recognition toward internally anchored value.

Nervous system mapping based on polyvagal theory (Porges, S.W. The Polyvagal Theory. Norton, 2011).

The Earth Made This

Formation: How Pollucite Becomes Pollucite

Cesium is one of the rarest alkali metals in Earth's crust, and pollucite is its primary ore. A framework silicate resembling analcime, it forms exclusively in lithium-cesium-tantalum type pegmatites during the final stages of magmatic crystallization, when incompatible elements like cesium concentrate in residual fluids.

Formula (Cs,Na)₂Al₂Si₄O₁₂·2H₂O. Isometric, typically colorless to white glassy masses rather than distinct crystals. The largest deposit is at Bernic Lake, Manitoba (Tanco Mine), where pollucite occurs in massive zones within a complexly zoned pegmatite. Up to 43% Cs₂O makes it one of the densest framework silicates. Low thermal expansion gives it industrial applications in specialized ceramics.

Material facts

What the stone is made of

Mineralogy: Cesium aluminum silicate hydrate, zeolite-related tectosilicate. Chemical formula: (Cs,Na)₂Al₂Si₄O₁₂·2H₂O. Crystal system: cubic. Mohs hardness: 6.5. Specific gravity: 2.85-2.94. Color: colorless, white, pale gray, or rarely pale blue. Luster: vitreous to sub-vitreous. Habit: cubic crystals, but usually massive or granular; well-formed crystals uncommon. Contains cesium as an essential structural element; the primary ore mineral for cesium extraction. Named after Pollux from Greek mythology (the mineral was originally found alongside "castorite," later identified as petalite). Isomorphous with analcime (Na-dominant), with cesium substituting for sodium.

Deeper geology

The most revealing feature of Pollucite is that its structure only makes sense when the formation sequence is reconstructed. Pollucite forms through late-stage crystallization in lithium-cesium-tantalum pegmatites. In mineralogical terms it is classified in cubic cesium aluminum silicate hydrate, with chemistry summarized as (Cs,Na)2Al2Si4O12 2H2O; cesium sodium aluminum silicate hydrate (analcime group zeolite).

During growth, the available ions have to arrange into a repeatable lattice or stable aggregate, and this produces the physical cues collectors later use: massive to granular pale material with relatively high specific gravity. Its standard field profile includes Cubic symmetry, Mohs hardness around 6. 5, specific gravity 2.

85-2. 94, and a luster described in the source record as Vitreous to subadamantine; can appear somewhat greasy on fresh fracture. Color in the traded material is commonly White, but the more important fact is setting.

Pollucite typically develops in rare pegmatites such as Bernic Lake and Bikita, where cooling rate, fluid chemistry, or burial history stay consistent long enough for the material to stabilize. Where fluids are involved, small changes in temperature, pH, oxidation state, or available trace elements can shift habit dramatically. Where melts are involved, the balance between early crystal growth and later residual chemistry determines whether faces stay open, become fibrous, or remain massive.

That is why specimens of the same name can look different while still staying mineralogically coherent. The crystal system is not decoration. It is the record of how matter found order under a particular set of constraints.

The associated thought for this stone turns on one idea: one need a cleaner reservoir for the rare energies one keep spending. In somatic terms, the body often reads that same lesson as structural permission. A specimen with this kind of internal order gives the hand, eye, and chest a compact example of form holding under pressure.

Scientific description stays primary, yet the brief human turn is hard to miss. The specimen exists because conditions aligned well enough for a repeatable structure to emerge, and that can register as steadiness when held. Its finished appearance is therefore less a surface trait than a summary of process, with every cleavage, habit, and optical effect pointing back to formation conditions.

Mineralogy

Mineral specs

Chemical Formula

(Cs,Na)2Al2Si4O12 2H2O; cesium sodium aluminum silicate hydrate (analcime group zeolite)

Crystal System

Cubic

Mohs Hardness

6.5

Specific Gravity

2.85-2.94

Luster

Vitreous to subadamantine; can appear somewhat greasy on fresh fracture

Color

White

Crystal system diagram represents the general cubic classification. Diagram created by Crystalis for educational reference.

Traditional Knowledge

Lore and culture around Pollucite

Science grounds the page. Tradition, lore, and remembered use make it readable as lived knowledge.

Archean geological heritage (Bikita, Zimbabwe): The Bikita pegmatite, host of the world's largest pollucite body, formed during the Archean Eon approximately 2.6 billion years ago. This places pollucite formation in the earliest period of continent-building on Earth. The Bikita pegmatite is also significant to Zimbabwe's economic history as a source of lithium, cesium, and tantalum. The discovery and exploitation of Bikita's rare minerals is intertwined with the colonial and post-colonial history of southern Africa (Symons, D. T., "Geology of the Bikita Pegmatite," 1961, Geological Survey of Southern Rhodesia).

Canadian mining tradition (Tanco, Manitoba): The Tanco mine at Bernic Lake, Manitoba, has been the Western world's primary source of cesium (from pollucite) since the 1960s. The Tanco pegmatite is one of the most complex and well-studied pegmatites globally, producing exceptional specimens of pollucite alongside spodumene, tantalite, and other rare minerals. Geophysical surveys have characterized the Tanco pegmatite's pollucite zone through gravity anomalies, as pollucite is denser than the surrounding pegmatite minerals (Thomas et al., 2016).

Italian mineralogical tradition (Elba): The island of Elba has been a source of mineralogical specimens since antiquity. Pollucite from Elba's granitic pegmatites was among the earliest described specimens. The Italian tradition of systematic mineralogy, extending back to Georgius Agricola and forward through the great Italian crystallographers, provides the scientific context within which pollucite was first characterized (Deer, W. A., Howie, R. A., & Zussman, J., 2013).

Unknown

Archean geological heritage (Bikita, Zimbabwe)

The Bikita pegmatite, host of the world's largest pollucite body, formed during the Archean Eon approximately 2.6 billion years ago. This places pollucite formation in the earliest period of continent-building on Earth. The Bikita pegmatite is also significant to Zimbabwe's economic history as a source of lithium, cesium, and tantalum. The discovery and exploitation of Bikita's rare minerals is intertwined with the colonial and post-colonial history of southern Africa (Symons, D. T., "Geology of the Bikita Pegmatite," 1961, Geological Survey of Southern Rhodesia). 2. Canadian mining tradition (Tanco, Manitoba): The Tanco mine at Bernic Lake, Manitoba, has been the Western world's primary source of cesium (from pollucite) since the 1960s. The Tanco pegmatite is one of the most complex and w

Sacred Match Notes

When this stone becomes the right door

Sacred Match prescribes Pollucite when you report: life moving at two incompatible tempos; difficulty staying in the body when feeling rises; protective bracing across the chest or jaw; fatigue after prolonged emotional or cognitive output; a need for firmer selection and cleaner limits. Sacred Match prescribes through physiological diagnosis, not preference. It queries the nervous system: current sensation, protective mechanism, and the biological need masked by both.

When that triangulation reveals the pattern most consistent with Pollucite, the prescription is based on the specimen's material logic: texture, weight, hardness, structure, and the way those properties can organize attention when placed on the body. life moving at two incompatible tempos -> seeking a more stable internal frame. difficulty staying in the body when feeling rises -> seeking contact that does not overwhelm.

protective bracing across the chest or jaw -> seeking boundary without full withdrawal. fatigue after prolonged emotional or cognitive output -> seeking restoration through simplification. a need for firmer selection and cleaner limits -> seeking clearer selection about what stays and what does not.

3-Minute Reset

The Cesium Vault

Cubic cesium-bearing zeolite with the lowest leach rate of any known mineral -- what is held inside this stone stays held, modeling containment for what you carry.

5 min protocol

1
Hold the pollucite in both hands. This cubic cesium-bearing zeolite has the lowest cesium leach rate of any known mineral -- what goes into pollucite stays in pollucite. Feel the stone's weight (specific gravity 2.85-2.94) and let it model containment. Some things are meant to be held, not released. Breathe in for 5, out for 7.
1 min
2
Place the stone at your solar plexus. The Ia-3d space group creates a structure of extraordinary symmetry -- 48 symmetry operations in the cubic system. Every direction you approach this mineral, it presents the same face. Ask: what in me is consistent regardless of who is looking? Breathe into that consistency for 60 seconds.
1 min 15 sec
3
Move the stone to your right hand and squeeze firmly. Pollucite is hardness 6.5 -- it can take the pressure. The cesium atoms inside the zeolite cages are physically trapped, not chemically bonded in a way that allows easy escape. Ask: what am I holding that I have been told I should release but that actually belongs inside me? Not everything needs to leave.
1 min
4
Hold the stone against the base of your skull. The hydrated formula ((Cs,Na)2Al2Si4O12 . 2H2O) means water is structural, not incidental. Some of what you carry is not excess -- it is architecture. Breathe and let your body distinguish between burden and structure.
1 min 15 sec
5
Set the stone down in front of you. Place both hands flat on either side. Pollucite does not advertise its cesium content -- it looks like ordinary quartz to the untrained eye. Your capacity to contain is also invisible. Let it stay invisible. Not everything valuable needs a display case.
30 sec

The #1 Question

Can Pollucite go in water?

Water Safety YES -- water-safe. Pollucite is a hard (Mohs 6.5-7), chemically stable mineral with an extremely low dissolution rate -- research on cesium leaching from pollucite confirms its remarkable resistance to aqueous attack (Rodriguez et al., 2013; Xu et al., 2015). It can be rinsed, cleaned with water, or used in indirect gem elixirs without concern. For direct gem water, the indirect method (stone beside the vessel) is still recommended as a standard precaution, but the mineral itself is among the most water-resistant in the crystal healing toolkit.

Mineral Distinction

What sets Pollucite apart

The usual error with Pollucite is not subtle: the wrong stone gets sold under the right name. The main confusion is with quartz or colorless feldspathoid material. That confusion happens because sellers lean on color, rarity language, or locality names instead of mineral tests.

For a consumer, the fastest reliable check is the fastest test is higher specific gravity than quartz combined with pegmatite association and cesium-rich analysis. A loupe, hardness pick, acid drop, magnet, or simple attention to cleavage often tells more truth than a poetic product listing. Secondary clues come from habit, heft, and setting.

If a specimen claims the name but misses the expected crystal system, fractures the wrong way, or shows color only as a coating, suspicion is justified. Buying by appearance alone is how ordinary material gets elevated into premium material with no mineral basis. With Pollucite, rare-ore minerals can be overstated or misidentified in collector markets.

Pollucite is a cesium zeolite that looks like quartz to most eyes — SG near 2. 9 and cubic symmetry separate it, but a lab test may be the only honest route for clear specimens.

Care and Maintenance

How to care for Pollucite

Pollucite is water-safe for brief rinses. Cesium aluminum silicate zeolite (Mohs 6. 5), chemically stable.

Brief cool rinse (30 seconds) is safe. Avoid prolonged soaking. Recommended cleansing: moonlight, selenite plate, smoke.

Store in a soft pouch; pollucite is rare and collector-grade.

Crystal companions

What pairs well with Pollucite

Thoughtful companions keep Pollucite from turning vague in use. Clear Quartz: signal amplifier and lens. It sharpens the organizing qualities of Pollucite without changing the core tone.

Body placement: set clear quartz at the crown and place Pollucite in the left palm. Black Tourmaline: perimeter and weight. It gives a denser edge to Pollucite, helping the body distinguish support from spillover.

Body placement: tuck black tourmaline into the right pocket while Pollucite rests at the sternum. Selenite: clear channel and reset. It helps Pollucite move from accumulation toward release, especially after crowded days.

Body placement: sweep selenite 2 to 3 inches above the shoulders, then hold Pollucite at the throat. Amethyst: cooling thought and sleep support. It tempers mental spin so Pollucite can work more quietly through the upper body.

Body placement: place amethyst under the pillow and Pollucite on the bedside table. The placements are intentionally specific so the body can assign each material a role instead of treating the arrangement as visual clutter. The placements are intentionally specific so the body can assign each material a role instead of treating the arrangement as visual clutter.

The placements are intentionally specific so the body can assign each material a role instead of treating the arrangement as visual clutter.

In Practice

How Pollucite is used

Your mind is restless and no amount of thinking is producing clarity. Pollucite is cesium aluminum silicate, Mohs 6. 5.

Cesium is the most electropositive element, meaning it gives up electrons more readily than any other. The mineral formed in lithium pegmatites where cesium concentrated in the final melt fraction. Hold it during mental spinning.

The cesium in this stone surrendered its electrons without resistance. Sometimes clarity comes from stopping the grip, not tightening it.

Verification

Authenticity

Pollucite: Mohs 6. 5. Specific gravity 2.

85-2. 94. Vitreous luster.

The primary cesium ore mineral, resembling analcime but containing cesium. Positive identification requires chemical analysis or X-ray diffraction. If sold specifically as pollucite (rare), ask what analysis confirmed it.

Visual identification alone is insufficient.

Temperature

Natural Pollucite should usually feel cooler than plastic or resin on first touch and warm more slowly in the hand.

Scratch logic

Use 6.5 on the Mohs scale as the check, not internet myths. A real specimen should behave in line with the hardness listed above.

Surface and luster

Look for a vitreous to subadamantine; can appear somewhat greasy on fresh fracture surface quality rather than a painted or plastic shine.

Weight and density

The listed specific gravity is 2.85-2.94. If a specimen feels unusually light for its size, it may deserve a second look.

Geographic Origins

Where Pollucite forms in the world

Bernic Lake, Manitoba, Canada. The Tanco Mine. The Tanco pegmatite at Bernic Lake in southeastern Manitoba hosts one of the world's largest concentrations of pollucite, a rare cesium-aluminum silicate zeolite.

This lithium-cesium-tantalum (LCT) pegmatite formed from the final, most fractionated stage of granitic magma evolution approximately 2. 64 billion years ago, concentrating rare alkali metals to extraordinary levels. The Tanco deposit contains the world's largest known reserves of cesium, hosted primarily in pollucite.

Afghanistan (Nuristan Province). The pegmatites of the Kunar and Laghman valleys produce gem-quality transparent pollucite crystals, some reaching facetable quality. Bikita, Zimbabwe.

The Bikita pegmatite field, one of the world's premier lithium-bearing pegmatite complexes. Elba, Italy. The classic San Piero in Campo pegmatites produced the first described pollucite crystals in 1846.

Maine, USA (Oxford County). Several Maine pegmatites have yielded small pollucite crystals.

FAQ

Frequently asked

What is Pollucite?

Pollucite is classified as a Pollucite belongs to the analcime group of zeolite-like framework silicates. It possesses a three-dimensional framework of corner-sharing [SiO4] and [AlO4] tetrahedra with Cs+ cations occupying the cavities. The structural channels are constructed by six-oxygen rings with a diameter of only 2.8 angstroms -- smaller than the diameter of Cs+ at 3.34 angstroms -- meaning cesium is effectively trapped within the structure once crystallized and cannot be released unless the framework is completely destroyed (Yuan et al., 2017; Rodriguez et al., 2013). This makes pollucite one of the most structurally retentive minerals known. It is also the primary ore mineral of cesium and one of the few gem-quality cesium-bearing minerals in existence.. Chemical formula: (Cs,Na)2Al2Si4O12 2H2O -- cesium sodium aluminum silicate hydrate (analcime group zeolite). Mohs hardness: 6.5--7. Crystal system: Cubic (space group Ia-3d) at room temperature; some specimens exhibit tetragonal (I41/a) structure at very low temperatures.

What is the Mohs hardness of Pollucite?

Pollucite has a Mohs hardness of 6.5--7.

Can Pollucite go in water?

What crystal system is Pollucite?

Pollucite crystallizes in the Cubic (space group Ia-3d) at room temperature; some specimens exhibit tetragonal (I41/a) structure at very low temperatures.

What is the chemical formula of Pollucite?

The chemical formula of Pollucite is (Cs,Na)2Al2Si4O12 2H2O -- cesium sodium aluminum silicate hydrate (analcime group zeolite).

Is Pollucite toxic?

Gem-quality pollucite is extremely rare and can be expensive. Handle with care appropriate to its value. Store in padded containers.

How does Pollucite form?

Formation Story Pollucite forms exclusively in highly evolved lithium-cesium-tantalum (LCT) granitic pegmatites -- the final, most fractionated products of granitic magma crystallization. Pegmatites are coarse-grained rocks formed in the latest stages of crystallization of granitic magmas, highly enriched in volatiles and trace elements, with crystals often exceeding 1 meter in size (Brooks, 2023). As a granitic magma body cools, the remaining melt becomes progressively enriched in incompatible

References

Sources and citations

Yuan, Jingkun, He, Peigang, Jia, Dechang, You, Jinsong, Liu, Xuzhao et al. (2017). Effects of Na + substitution Cs + on the microstructure and thermal expansion behavior of ceramic derived from geopolymer. Journal of the American Ceramic Society. [SCI]
DOI: 10.1111/jace.14968
Xu, Hongwu, Chavez, Manuel E., Mitchell, Jeremy N., Garino, Terry J., Schwarz, Haiqing L. et al. (2015). Crystal Structure and Thermodynamic Stability of Ba/Ti‐Substituted Pollucites for Radioactive Cs/Ba Immobilization. Journal of the American Ceramic Society. [SCI]
DOI: 10.1111/jace.13608
Brooks, Kent. (2023). Granites. Geology Today. [SCI]
DOI: 10.1111/gto.12450
Steveson, Andrew J., Kriven, Waltraud M. (2021). Tailorable thermal expansion in leucite‐pollucite materials derived from geopolymers for environmental barrier coatings. Journal of the American Ceramic Society. [SCI]
DOI: 10.1111/jace.17630
Payne, Danielle R., Vinson, Jaime, Powers, Jan, McDaniel, Brandon T., Sevier, Cherise et al. (2024). Effect of Weighted Blanket Versus Traditional Practices on Anxiety and Pain in Patients Undergoing Elective Surgery: A Multicenter Randomized Controlled Trial. AORN Journal. [SCI]
DOI: 10.1002/aorn.14146
Park, Tae‐Jin, Navrotsky, Alexandra. (2010). Thermochemistry and Crystallization of Glass‐Forming Y‐Substituted Sr‐Analogues of Fresnoite (Sr 2 TiSi 2 O 8 ). Journal of the American Ceramic Society. [SCI]
DOI: 10.1111/j.1551-2916.2010.03698.x
Brooks, Kent. (2020). Lithium minerals. Geology Today. [SCI]
DOI: 10.1111/gto.12326
Fei, Guangchun, Li, Baohua, Yang, Jiyi, Chen, Xu, Luo, Wei et al. (2017). Geology, Fluid Inclusion Characteristics and <scp>H</scp>–<scp>O</scp>–<scp>C</scp> Isotopes of Large <scp>L</scp>ijiagou Pegmatite Spodumene Deposit in <scp>S</scp>ongpan–<scp>G</scp>arze Fold Belt, <scp>E</scp>astern <scp>T</scp>ibet: <scp>I</scp>mplications for ore Genesis. Resource Geology. [SCI]
DOI: 10.1111/rge.12145
Li, Jingwei, Xu, Dong, Wang, Wenlong, Wang, Xujiang, Mao, Yanpeng et al. (2020). Review on Selection and Experiment Method of Commonly Studied Simulated Radionuclides in Researches of Nuclear Waste Solidification. Science and Technology of Nuclear Installations. [SCI]
DOI: 10.1155/2020/3287320
Anderson, A. J. (2013). Are silicate‐rich inclusions in spodumene crystallized aliquots of boundary layer melt?. Geofluids. [SCI]
DOI: 10.1111/gfl.12041
Thomas, M.D., Ford, K.L., Keating, P. (2016). Review paper: Exploration geophysics for intrusion‐hosted rare metals. Geophysical Prospecting. [SCI]
DOI: 10.1111/1365-2478.12352
Rodriguez, Mark A., Garino, Terry J., Rademacher, David X., Zhang, Xiaoyi, Nenoff, Tina M. (2013). The Synthesis of <scp> <scp>Ba</scp> </scp> ‐ and <scp> <scp>Fe</scp> </scp> ‐ Substituted CsAlSi 2 O 6 Pollucites. Journal of the American Ceramic Society. [SCI]
DOI: 10.1111/jace.12396

Closing Notes

Pollucite

The primary ore of cesium, one of the rarest alkali metals. From lithium-cesium-tantalum pegmatites. The science documents how the rarest elements concentrate in the last fractions of cooling magma.

The practice asks what value means when your element is so uncommon most chemists have never held it.

Field Notes