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⇱ Cesplumtantite: Mineral information, data and localities.

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Cesplumtantite

A valid IMA mineral species
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About CesplumtantiteHide

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Formula:
(Cs,Na)2(Pb,Sb3+)3Ta8O24
Colour:
Colourless
Lustre:
Adamantine
Hardness:
7
Specific Gravity:
6.87 (Calculated)
Crystal System:
Tetragonal
Name:
From the chemical composition that includes CESium, lead (Latin PLUMbum), and TANTalum.
This page provides mineralogical data about Cesplumtantite.


Unique IdentifiersHide

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Mindat ID:
941
Long-form identifier:
mindat:1:1:941:4

IMA Classification of CesplumtantiteHide

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Approved
IMA Formula:
Cs2Pb3Ta8O24
First published:
1986

Classification of CesplumtantiteHide

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4.DM.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
M : With large (+- medium-sized) cations; unclassified
8.7.11.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
18.1.30

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
CptanIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of CesplumtantiteHide

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Adamantine
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
Hardness:
VHN40=1240 kg/mm2 - Vickers
Cleavage:
None Observed
Density:
6.87(5) g/cm3 (Calculated)

Optical Data of CesplumtantiteHide

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Type:
Uniaxial
Anisotropism:
Strong
Bireflectance:
Weak
Reflectivity:
WavelengthR1 (%)R2 (%)
476nm18.2%17.1%
553nm17.3%16.5%
589nm17.1%16.5%
656nm15.6%15.3%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 18.2%.
R1 shown in black, R2 shown in
Colour in reflected light:
Light grey
Internal Reflections:
None
Pleochroism:
Not Visible

Chemistry of CesplumtantiteHide

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Mindat Formula:
(Cs,Na)2(Pb,Sb3+)3Ta8O24
Element Weights:
Element% weight
Ta53.240 %
Pb22.862 %
O14.122 %
Cs9.776 %

Calculated from ideal end-member formula.

Crystallography of CesplumtantiteHide

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Crystal System:
Tetragonal
Cell Parameters:
a = 13.552(8) Å, c = 6.445(5) Å
Ratio:
a:c = 1 : 0.476
Unit Cell V:
1,183.67 ų (Calculated from Unit Cell)
Z:
2
Twinning:
соmрlех polysynthetic twinning
Comment:
Point Group: n.d. ; Space Group: n.d.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:
d-spacingIntensity
3.054 Å(100)
1.869 Å(70)
1.593 Å(70)
6.11 Å(50)
3.19 Å(50)
2.037 Å(50b)
1.181 Å(50)

Geological EnvironmentHide

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Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites

Type Occurrence of CesplumtantiteHide

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General Appearance of Type Material:
Veinlets and elongated concretions measuring to 0.3 mm.
Place of Conservation of Type Material:
Mining Museum, State University, St. Petersburg, Russia, 1547/2.
Geological Setting of Type Material:
Granite pegmatite
Associated Minerals at Type Locality:

Synonyms of CesplumtantiteHide

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Other Language Names for CesplumtantiteHide

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Common AssociatesHide

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Associations Based on Photo Data:
2 photos of Cesplumtantite associated with ThoreauliteSn2+Ta2O6
1 photo of Cesplumtantite associated with FoorditeSn2+Nb2O6

Related Minerals - Strunz-mindat GroupingHide

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4.DM.SugarwhiteitePb2Te5O12Mon. 2/m : P21/b
4.DM.BahariyaiteKMnO4Orth. mmm(2/m2/m2/m) : Pnma
4.DM.05Rankamaite(Na,K)3(Ta,Nb,Al)11(O,OH)31Orth. mmm(2/m2/m2/m) : Cmmm
4.DM.05Sosedkoite(K,Na)5Al2(Ta,Nb)22O60Orth.
4.DM.20EyseliteFe3+Ge4+3O7(OH)Orth.
4.DM.25KonzettiteCaMn4+Te6+O6Trig. 32 : P312
4.DM.25KuranakhitePbMn4+Te6+O6Orth.
4.DM.30MambertiiteBiMo5+2.80O8(OH)Tric. 1 : P1
4.DM.30GelosaiteBiMo6+(2-5x)Mo5+6xO7(OH) · H2O Mon. 2/m : P21/m
4.DM.35EkebergiteThFeNb2O8Mon. 2/m : P2/b
4.DM.45RiesiteTiO2Mon. 2/m : P2/b
4.DM.50SardignaiteBiMo2O7(OH) · 2H2OMon. 2/m : P21/m
4.DM.55Tewite(K1.5◻0.5)(Te1.25W0.25◻0.5)W5O19Orth. mmm(2/m2/m2/m) : Pban
4.DM.60WumuiteK(W2.67Al0.33)O9Hex. 6/mmm(6/m2/m2/m) : P6/mmm
4.DM.60KingsgateiteZrMo6+2O7(OH)2 · 2H2OTet. 4mm : I41cd
4.DM.60MorningstariteNa(W2.67Fe3+0.33)O9 · H2OHex. 6/mmm(6/m2/m2/m) : P6/mmm

Other InformationHide

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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for CesplumtantiteHide

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mindat.org URL:
https://www.mindat.org/min-941.html
Please feel free to link to this page.

References for CesplumtantiteHide

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Localities for CesplumtantiteHide

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Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 👁 Image
symbol to view information about a locality. The 👁 Image
symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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👁 Image
- This locality has map coordinates listed. 👁 Image
- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species. 👁 Image
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
DR Congo
  • North Kivu
    • Masisi Territory
      • Osso
        • Mumba
Melcher et al. (2015)
  • Tanganyika
Voloshin et al. (1986)
Quick NavTopAbout CesplumtantiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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