Parabariomicrolite Mineral Data

General Parabariomicrolite Information

Chemical Formula:

BaTa4O10(OH)2•2H20

Composition:

Molecular Weight = 1,091.16 gm

Barium 12.59 % Ba 14.05 % BaO

Tantalum 66.33 % Ta 81.00 % Ta₂O₅

Hydrogen 0.55 % H 4.95 % H₂O

Oxygen 20.53 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaTa₄O₁₀(OH)₂•2(H₂O)

Environment:

Alteration product of microlite crystals, in a decomposed zoned pegmatite.

IMA Status:

Approved IMA 1986

Locality:

Alto do Giz pegmatite, near Parelhas, Rio Grande do Norte, Brazil. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for near and its relation to bariomicrolite.

Name Pronunciation:

Parabariomicrolite + Pronunciation

Synonym:

ICSD 40946

PDF 39-401

Parabariomicrolite Crystallography

Axial Ratios:

a:c = 1:2.49091

Cell Dimensions:

a = 7.429, c = 18.505, Z = 3; V = 884.46 Den(Calc)= 6.15

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 3.04(1), 3.172(0.65), 6.18(0.5),

Physical Properties of Parabariomicrolite

Cleavage:

{0001} Good, {1010} Good

Color:

White, Light pink.

Density:

5.97

Diaphaneity:

Translucent

Hardness:

4 - Fluorite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Parabariomicrolite

Optical Data:

NCalc= 1.97 - from Gladstone-Dale relationship (KC = 0.1571) where Ncalc=Dcalc*KC+1
NCalc= 1.94 - from Gladstone-Dale relationship (KC = 0.1571) where Ncalc=Dmeas*KC+1

Calculated Properties of Parabariomicrolite

Electron Density:

Bulk Density (Electron Density)=5.25 gm/cc
note: Specific Gravity of Parabariomicrolite =6.15 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Parabariomicrolite}= 858.81 barns/electron
U=PE_{Parabariomicrolite} x rElectron Density=4,511.27 barns/cc.

Radioactivity:

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

Parabariomicrolite Classification

Dana Class:

08.02.08.01 (08)Multiple Oxides with Nb, Ta, and Ti

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

(08.02.08)Dana Group

08.02.08.01 Parabariomicrolite BaTa4O10(OH)2•2H20 R 3m 3 2/m

Strunz Class:

04.FJ.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FJ -Hydroxides with H2O ï¿½ (OH); corner-sharing octahedra

04.FJ.20 Parabariomicrolite BaTa4O10(OH)2•2H20 R 3m 3 2/m

Other Parabariomicrolite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Parabariomicrolite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Parabariomicrolite

BaTa4O10(OH)2•2H20
Dana No: 08.02.08.01 Strunz No: 04.FJ.20
Locality:

Notes:

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