IMA1998-018 Mineral Data

IMA1998-018 Mineral Data

General IMA1998-018 Information

Chemical Formula:

(Na,Ca,Bi)2Ta2O6F

Composition:

Molecular Weight = 570.32 gm

Sodium 4.84 % Na 6.52 % Na₂O

Calcium 4.22 % Ca 5.90 % CaO

Tantalum 63.45 % Ta 77.48 % Ta₂O₅

Bismuth 7.33 % Bi 8.17 % Bi₂O₃

Oxygen 16.83 % O

Fluorine 3.33 % F 3.33 % F

- % F -1.40 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na_1.2Ca_0.6Bi_0.2Ta₂O₆F

Environment:

A member of the microlite group

IMA Status:

Proposed IMA 1998 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

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IMA1998-018 Crystallography

Cell Dimensions:

a = 10.4451, V = 1,139.56

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

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

By Intensity(I/I_o): 3.015(1), 1.846(0.59), 1.574(0.47),3.148(0.33), 6.023(0.31), 2.61(0.27), 1.198(0.23),

Physical Properties of IMA1998-018

Color:

Green.

Diaphaniety:

Transparent

Luster:

Adamantine

Optical Properties of IMA1998-018

Optical Data:

Isotropic, n=2.03.

Calculated Properties of IMA1998-018

Fermion Index

Fermion Index = 0.00021
Boson Index = 0.99979

Photoelectric:

PE_IMA1998-018= 899.26 barns/electron
U=PE_IMA1998-018 x r_electron= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

IMA1998-018 is Not Radioactive

IMA1998-018 Classification

Dana Class:

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

(8.2)where (A)2 (B2O6) (O,OH,F)

(8.2.2)Pyrochlore Group (Microlite Subgroup; Ta>Nb;(Ta+Nb)>2(Ti)

8.2.2.1 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m

8.2.2.2 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m

8.2.2.3 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m

8.2.2.4 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m

8.2.2.5 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m

8.2.2.6 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m

8.2.2.7 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m

8.2.2.8 IMA1998-018 ! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m

Strunz Class:

IV/X.00-00 IV - Oxides

IV/X - Unclassified Strunz Oxides

IV/X.00 - Pyrochlore Group

Other IMA1998-018 Information

References:

NAME( CanMin, Vol 38) PHYS. PROP.(CanMin, vol 38) OPTIC PROP.(CanMin, Vol 38)

See Also:

Links to other databases for IMA1998-018 :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch)

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Print or Cut-and-Paste your IMA1998-018 Specimen Label here :

IMA1998-018

(Na,Ca,Bi)2Ta2O6F
Dana No: 8.2.2.8 Strunz No: IV/X.00-00
Locality:

Notes: