| |
 |
Bariomicrolite Mineral Data
|
|
|
General Bariomicrolite Information
|
 Chemical Formula: |
Ba(Ta,Nb)2(O,OH)7 |
| Composition: |
Molecular Weight = 506.31 gm |
| |
Barium 8.14 % Ba 9.08 % BaO |
| |
Tantalum 64.33 % Ta 78.55 % Ta2O5 |
| |
Niobium 3.67 % Nb 5.25 % Nb2O5 |
| |
Hydrogen 0.80 % H 7.12 % H2O |
| |
Oxygen 23.07 % O |
| |
______ ______ |
| |
100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ba0.3Ta1.8Nb0.2O5.3(H2O)2 |
| Environment: |
In a concentrate from alluvium derived from a pegmatite. |
| IMA Status: |
Approved IMA 1977 |
| Locality: |
Chi-Chico, Sao Joao del Rei, Minas Gerais, Brazil. Link to MinDat.org Location Data. |
| Name Origin: |
Assigned by the IMA pyrochlore nomenclature group for the predominant barium content and to microlite. |
| Name Pronunciation: |
Bariomicrolite + Pronunciation  |
| Synonym: |
ICSD 45824 ? |
| |
PDF 16-616 |
| |
Rijkeboerite |
| |
Bariomicrolite Crystallography
|
| Cell Dimensions: |
a = 10.57, Z = 8; V = 1,180.93 Den(Calc)= 5.70 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.03(1), 6.04(0.8), 3.18(0.65), |
| |
Physical Properties of Bariomicrolite
|
| Color: |
Brown, Colorless, Yellow, White, Pink brown. |
| Density: |
5.68 |
| Diaphaneity: |
Translucent to Opaque |
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
| Habit: |
Metamict - Mineral originally crystalline, now amorphous due to radiation damage. |
| Hardness: |
4.5-5 - Near Apatite |
| Luster: |
Adamantine - Resinous |
| Streak: |
white |
| |
Optical Properties of Bariomicrolite
|
| Optical Data: |
NCalc= 1.96 - from Gladstone-Dale relationship (KC = 0.1685) where Ncalc=Dcalc*KC+1
NCalc= 1.96 - from Gladstone-Dale relationship (KC = 0.1685) where Ncalc=Dmeas*KC+1
|
| |
Calculated Properties of Bariomicrolite
|
| Electron Density: |
Bulk Density (Electron Density)=4.93 gm/cc
note: Specific Gravity of Bariomicrolite =5.70 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEBariomicrolite = 810.23 barns/electron
U=PEBariomicrolite x rElectron Density=3,991.57 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bariomicrolite is Not Radioactive |
| |
Bariomicrolite Classification
|
| Dana Class: |
08.02.02.02 (08)Multiple Oxides with Nb, Ta, and Ti |
| |
(08.02)where (A)2 (B2O6) (O,OH,F) |
| |
(08.02.02)Pyrochlore Group (Microlite Subgroup; Ta>Nb;(Ta+Nb)>2(Ti) |
| |
08.02.02.01 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m |
| |
08.02.02.02 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m |
| |
08.02.02.03 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m |
| |
08.02.02.04 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m |
| |
08.02.02.05 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m |
| |
08.02.02.06 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m |
| |
08.02.02.07 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m |
| |
08.02.02.08 Fluornatromicrolite! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m |
| Strunz Class: |
04.DH.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
| |
04.D - Metal:Oxygen = 1:2 and similar |
| |
04.DH -With large (� medium-sized) cations; sheets of edge-sharing octahedra |
| |
04.DH.15 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic |
| |
04.DH.15 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m |
| |
04.DH.15 Ferritungstite (K,Ca,Na)(W,Fe)2(O,OH)6•(H2O) F d3m 4/m 3 2/m |
| |
04.DH.15 Cesstibtantite (Cs,Na)SbTa4O12 F d3m 4/m 3 2/m |
| |
04.DH.15 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m |
| |
04.DH.15 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m |
| |
04.DH.15 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m |
| |
04.DH.15 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m |
| |
04.DH.15 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m |
| |
04.DH.15 Jixianite Pb(W,Fe)2(O,OH)7 F d3m 4/m 3 2/m |
| |
04.DH.15 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m |
| |
04.DH.15 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6•(H2O,K) F d3m 4/m 3 2/m |
| |
04.DH.15 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m |
| |
04.DH.15 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m |
| |
04.DH.15 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m |
| |
04.DH.15 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m |
| |
04.DH.15 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m |
| |
04.DH.15 Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4O12 F d3m 4/m 3 2/m |
| |
04.DH.15 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m |
| |
04.DH.15 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m |
| |
04.DH.15 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m |
| |
04.DH.15 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m |
| |
04.DH.15 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m |
| |
04.DH.15 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)•n(H2O) F d3m 4/m 3 2/m |
| |
04.DH.15 Fluornatromicrolite! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m |
| |
04.DH.15 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m |
| |
04.DH.15 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3 |
| |
04.DH.15 Elsmoreite! WO3•0.5(H2O) F d3m 4/m 3 2/m |
| |
Other Bariomicrolite Information
|
| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Bariomicrolite :
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
Search for Bariomicrolite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Bariomicrolite :
Ask about Bariomicrolite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Español
Print or Cut-and-Paste your Bariomicrolite Specimen Label here :
|
Bariomicrolite
Ba(Ta,Nb)2(O,OH)7
Dana No: 08.02.02.02 Strunz No: 04.DH.15
Locality:
Notes:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.