Cesplumtantite
A valid IMA mineral species
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About Cesplumtantite
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.
Type Locality:
This page provides mineralogical data about Cesplumtantite.
Unique Identifiers
Mindat ID:
941
Long-form identifier:
mindat:1:1:941:4
GUID
(UUID V4):
(UUID V4):
a542dfc8-efdd-4333-94b8-5d89e03e3fc1
IMA Classification of Cesplumtantite
Approved
IMA Formula:
Cs2Pb3Ta8O24
First published:
1986
Classification of Cesplumtantite
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
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
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
18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Cptan | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Cesplumtantite
Adamantine
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
7 on Mohs scale
Hardness:
VHN40=1240 kg/mm2 - Vickers
Cleavage:
None Observed
Density:
6.87(5) g/cm3 (Calculated)
Optical Data of Cesplumtantite
Type:
Uniaxial
Anisotropism:
Strong
Bireflectance:
Weak
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 476nm | 18.2% | 17.1% |
| 553nm | 17.3% | 16.5% |
| 589nm | 17.1% | 16.5% |
| 656nm | 15.6% | 15.3% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 18.2%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Light grey
Internal Reflections:
None
Pleochroism:
Not Visible
Chemistry of Cesplumtantite
Mindat Formula:
(Cs,Na)2(Pb,Sb3+)3Ta8O24
Crystallography of Cesplumtantite
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 Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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 Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Cesplumtantite
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:
Reference:
Voloshin, A.V., Pakhomovskii, Y.A., Bakhchisaraitsev, A.Y., Devnina, N.N. (1986) Cesplumtantite - A new cesium-lead tantalate from granitic pegmatites. Mineralogiceskij Zhurnal: 8: 92-98.
Synonyms of Cesplumtantite
Other Language Names for Cesplumtantite
German:Cäsioplumtantit
Spanish:Cesplumtantita
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Cesplumtantite associated with Thoreaulite | Sn2+Ta2O6 |
| 1 photo of Cesplumtantite associated with Foordite | Sn2+Nb2O6 |
Related Minerals - Strunz-mindat Grouping
| 4.DM. | Bahariyaite | KMnO4 |
| 4.DM.05 | Rankamaite | (Na,K)3(Ta,Nb,Al)11(O,OH)31 |
| 4.DM.05 | Sosedkoite | (K,Na)5Al2(Ta,Nb)22O60 |
| 4.DM.20 | Eyselite | Fe3+Ge4+3O7(OH) |
| 4.DM.25 | Kuranakhite | PbMn4+Te6+O6 |
| 4.DM.30 | Gelosaite | BiMo6+(2-5x)Mo5+6xO7(OH) · H2O |
| 4.DM.30 | Mambertiite | BiMo5+2.80O8(OH) |
| 4.DM.35 | Ekebergite | ThFeNb2O8 |
| 4.DM.45 | Riesite | TiO2 |
| 4.DM.50 | Sardignaite | BiMo2O7(OH) · 2H2O |
| 4.DM.55 | Tewite | (K1.5◻0.5)(Te1.25W0.25◻0.5)W5O19 |
| 4.DM.60 | Wumuite | KAl0.33W2.67O9 |
| 4.DM.60 | Kingsgateite | ZrMo6+2O7(OH)2 · 2H2O |
Other Information
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 Cesplumtantite
mindat.org URL:
https://www.mindat.org/min-941.html
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References for Cesplumtantite
Reference List:
Localities for Cesplumtantite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
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Manono-Kitotolo mine, Tanganyika, DR Congo