Tetrarooseveltite Mineral Data

General Tetrarooseveltite Information

Chemical Formula:

BiAsO4

Composition:

Molecular Weight = 347.90 gm

Bismuth 60.07 % Bi 66.97 % Bi₂O₃

Arsenic 21.54 % As 33.03 % As₂O₅

Oxygen 18.40 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Bi(AsO₄)

Environment:

Oxidation product found on fluorite-barite gange.

IMA Status:

Approved IMA 1994

Locality:

Josef mine, Moldava deposit, Krune Hory Mountains, norhtwestern Bohemia, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named as the tetragonal analog of rooseveltite.

Name Pronunciation:

Tetrarooseveltite + Pronunciation

Synonym:

IMA1993-006

Tetrarooseveltite Image

Images:

Tetrarooseveltite

Comments: Light-yellow, earthy tetrarooseveltite.
Location: Moldava, Teplice (Teplitz), KrusnÃ© Hory (Erzgebirge), SeveroceskÃ½ Kraj, Bohemia, Czech Republic. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Tetrarooseveltite Crystallography

Axial Ratios:

a:c = 1:2.29891

Cell Dimensions:

a = 5.085, c = 11.69, Z = 4; V = 302.27 Den(Calc)= 7.64

Crystal System:

Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 4₁/a

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

By Intensity(I/I_o): 3.066(1), 1.933(0.55), 2.546(0.12),

Physical Properties of Tetrarooseveltite

Color:

Yellowish white, White.

Diaphaneity:

Translucent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Powdery - Forms a loose, poorly-coherent pulverulent mass.

Hardness:

2.5 - Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Tetrarooseveltite

Gladstone-Dale:

CI calc= -0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1571,KC= 0.156
Ncalc = 2.19

Optical Data:

Uniaxial (+), w=2.2, e=2.2, bire=0.0000.

Calculated Properties of Tetrarooseveltite

Electron Density:

Bulk Density (Electron Density)=6.50 gm/cc
note: Specific Gravity of Tetrarooseveltite =7.64 gm/cc.

Fermion Index:

Fermion Index = 0.0000888987
Boson Index = 0.9999111013

Photoelectric:

PE_{Tetrarooseveltite}=1,152.58 barns/electron
U=PE_{Tetrarooseveltite} x rElectron Density=7,492.05 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tetrarooseveltite is Not Radioactive

Tetrarooseveltite Classification

Dana Class:

38.04.05.01 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.05)Dana Group

38.04.05.01 Tetrarooseveltite BiAsO4 I 4₁/a 4/m

Strunz Class:

08.AD.55 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AD -With only large cations

08.AD.55 Tetrarooseveltite BiAsO4 I 4₁/a 4/m

Other Tetrarooseveltite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.79,p1211,1994) OPTIC PROP.(Am.Min.,Vol.79,p1211,1994)

See Also:

Links to other databases for Tetrarooseveltite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Tetrarooseveltite Specimen Label here :

Tetrarooseveltite

BiAsO4
Dana No: 38.04.05.01 Strunz No: 08.AD.55
Locality:

Notes:

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