Bariopyrochlore Mineral Data + Say BARIOPYROCHLORE

General Bariopyrochlore Information

Help on Chemical  Formula: Chemical Formula: (Ba,Sr)(Nb,Ti)2(O,OH)7
Help on Composition: Composition: Molecular Weight = 343.55 gm
   Barium     11.99 %  Ba   13.39 % BaO
   Strontium   5.10 %  Sr    6.03 % SrO
   Calcium     1.17 %  Ca    1.63 % CaO
   Titanium    2.79 %  Ti    4.65 % TiO2
   Niobium    48.68 %  Nb   69.64 % Nb2O5
   Hydrogen    0.47 %  H     4.20 % H2O
   Oxygen     29.81 %  O
             ______        ______ 
             100.00 %       99.53 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba0.3Sr0.2Ca0.1Nb1.8Ti0.2O5.6(H2O)0.8
Help on Environment: Environment: Contact zone of a highly weathered, biotite-bearing roof pendant in a carbonatite.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: From the Mbeya carbonatite, Panda Hill, near Mbeya, Tanzania. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Assigned by the IMA pyrochlore nomenclature group for the predominant barium content and to pyrochlore.
Help on Synonym: Synonym: ICSD 45819
  PDF 12-285
  Pandaite
 

Bariopyrochlore Image

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Bariopyrochlore

Comments: Yellow crystalline massive bariopyrochlore.
Location: Catalao #2 Mine, Goias, Brazil. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bariopyrochlore Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.562, Z = 8; V = 1,178.25 Den(Calc)= 3.87
Help on Crystal System: 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/Io): 3.044(1), 6.09(0.8), 1.864(0.7),
 

Physical Properties of Bariopyrochlore

Help on Cleavage: Cleavage: [111] Indistinct, [111] Indistinct, [111] Indistinct
Help on Color: Color: Green gray, Yellow gray.
Help on Density: Density: 4
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Luster: Luster: Resinous
Help on Streak: Streak: white
 

Optical Properties of Bariopyrochlore

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.097 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.134 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2817,KPDmeas= 0.2725,KC= 0.2485
Help on Optical Data: Optical Data: Isotropic, n=2.07-2.11.
 

Calculated Properties of Bariopyrochlore

Help on Electron Density: Electron Density:

relectron=3.67 gm/cc
note: rBariopyrochlore =4.00 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.0287
Boson Index = 0.9713
Help on Photoelectric: Photoelectric:

PEBariopyrochlore = 134.09 barns/electron
U=PEBariopyrochlore x relectron= 491.47 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bariopyrochlore is Not Radioactive

 

Bariopyrochlore Classification

Help on  Dana Class: Dana Class: 8.2.1.3 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.2)where (A)2 (B2O6) (O,OH,F)
  (8.2.1)Pyrochlore Group (Pyrochlore Subgroup; Nb>Ta;(Nb+Ta)>2(Ti)
 
8.2.1.1 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m
 
8.2.1.2 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K) F d3m 4/m 3 2/m
 
8.2.1.3 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m
 
8.2.1.4 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3
 
8.2.1.5 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 
8.2.1.6 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m
 
8.2.1.7 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 
8.2.1.8 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m
 
8.2.1.9 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)·n(H2O) F d3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: IV/C.17-50 IV - Oxides
  IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
  IV/C.17 - Pyrochlore group, Pyrochlore series with Nb > Ti
 
IV/C.17-10 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m
 
IV/C.17-20 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.17-30 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K) F d3m 4/m 3 2/m
 
IV/C.17-40 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.17-50 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.17-60 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3
 
IV/C.17-70 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 
IV/C.17-80 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m
 
IV/C.17-85 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)·n(H2O) F d3m 4/m 3 2/m
 
IV/C.17-90 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 

Other Bariopyrochlore Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Bariopyrochlore :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST 12 -École des Mines de Paris

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Bariopyrochlore

(Ba,Sr)(Nb,Ti)2(O,OH)7
Dana No: 8.2.1.3 Strunz No: IV/C.17-50
Locality:

 

Notes:

 

 
   
 
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