Cesplumtantite Mineral Data

Cesplumtantite Mineral Data

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General Cesplumtantite Information

Chemical Formula:

(Cs,Na,Ca)2(Pb,Sb+++,Sn)3Ta8O24

Composition:

Molecular Weight = 2,479.94 gm

Cesium 4.82 % Cs 5.11 % Cs₂O

Sodium 0.56 % Na 0.75 % Na₂O

Calcium 0.65 % Ca 0.90 % CaO

Tantalum 52.53 % Ta 64.15 % Ta₂O₅

Niobium 2.25 % Nb 3.22 % Nb₂O₅

Tin 2.87 % Sn 1.63 % SnO / 1.82 % SnO₂

Antimony 2.45 % Sb 2.94 % Sb₂O₃

Lead 18.38 % Pb 19.80 % PbO

Oxygen 15.48 % O

______ ______

100.00 % 100.32 % = TOTAL OXIDE

Empirical Formula:

Cs_0.9Na_0.6Ca_0.4Pb_2.2Sb_0.5Sn_0.3Ta_7.2Nb_0.6Sn_0.3O₂₄

Environment:

Veinlets in thoreaulite.

IMA Status:

Approved IMA 1986

Locality:

Manono, Shaba, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for the composition (CESium, PLUMium (lead), and TANTalum).

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Cesplumtantite Crystallography

Axial Ratios:

a:c = 1:0.47557

Cell Dimensions:

a = 13.552, c = 6.445, Z = 2; V = 1,183.67 Den(Calc)= 6.96

Crystal System:

TetragonalSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.054(1), 1.593(0.7), 1.869(0.7),

Physical Properties of Cesplumtantite

Cleavage:

None

Color:

Colorless.

Diaphaniety:

Transparent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

7 - Quartz

Luster:

Adamantine

Streak:

white

Optical Properties of Cesplumtantite

Optical Data:

Uniaxial (?).

NCalc= 2.04 - from Gladstone-Dale relationship (KC = 0.1498) where Ncalc=Dcalc*KC+1

RL Anisotrophism:

Strong.

RL Bireflectance:

Weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Cesplumtantite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
476 nm	18.20	17.10
553 nm	17.30	16.50
589 nm	17.10	16.50
656 nm	15.60	15.30

**Calculated Relative Intensity Colors of Cesplumtantite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%	550%
R₁
R₂

Calculated Properties of Cesplumtantite

Electron Density:

r_electron=5.85 gm/cc
note: r_{Cesplumtantite}=6.96 gm/cc.

Fermion Index

Fermion Index = 0.04554
Boson Index = 0.95446

Photoelectric:

PE_{Cesplumtantite}=1,023.11 barns/electron
U=PE_{Cesplumtantite} x r_electron=5,985.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cesplumtantite is Not Radioactive

Cesplumtantite Classification

Dana Class:

8.7.11.1 (8)Multiple Oxides with Nb, Ta, and Ti

(8.7)Dana Type

(8.7.11)Dana Group

8.7.11.1 Cesplumtantite (Cs,Na,Ca)2(Pb,Sb,Sn)3Ta8O24 Unk Tetra

Strunz Class:

IV/D.26-60 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.26 - Lithiotantite - Cesplumtantite series

IV/D.26-10 Lithiotantite Li(Ta,Nb)3O8 P 2₁/c 2/m

IV/D.26-20 Natrotantite Na2Ta4O11 R 3-c 3 2/m

IV/D.26-30 Irtyshite Na2(Ta,Nb)4O11 P 6₃/m 6/m

IV/D.26-40 Calciotantite Ca(Ta,Nb)4O11 P 6₃22 6 2 2

IV/D.26-50 Ungursaite? NaCa5(Ta,Nb)24O65(OH) P 6₃/m,P 6₃ Hex

IV/D.26-60 Cesplumtantite (Cs,Na,Ca)2(Pb,Sb,Sn)3Ta8O24 Unk Tetra

Other Cesplumtantite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.74,p501,1989) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Cesplumtantite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Cesplumtantite

(Cs,Na,Ca)2(Pb,Sb+++,Sn)3Ta8O24
Dana No: 8.7.11.1 Strunz No: IV/D.26-60
Locality:

Notes: