Stibiomicrolite Mineral Data + Say STIBIOMICROLITE

General Stibiomicrolite Information

Help on Chemical  Formula: Chemical Formula: (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7
Help on Composition: Composition: Molecular Weight = 538.04 gm
   Sodium     2.14 %  Na    2.88 % Na2O
   Calcium    5.21 %  Ca    7.30 % CaO
   Tantalum  43.72 %  Ta   53.38 % Ta2O5
   Niobium   12.09 %  Nb   17.29 % Nb2O5
   Antimony  15.84 %  Sb   18.96 % Sb2O3
   Hydrogen   0.19 %  H     1.67 % H2O
   Oxygen    20.82 %  O
            ______        ______ 
            100.00 %      101.49 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sb0.7Ca0.7Na0.5Ta1.3Nb0.7O6(OH)
Help on Environment: Environment: Replacing stibiotantalite, in the lithium-rich albite unit of a complex granite pegmatite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1938
Help on Locality: Locality: Varutrask pegmatite, 15 km norhtwest of Skelleftea, Vasterbotten, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for antimony (STIBIum) in the composition and membership in the microlite subgroup of the pyrochlore group.
 

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Stibiomicrolite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.455, Z = 8; V = 1,142.81 Den(Calc)= 6.25
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): 3.01(1), 3.14(0.9), 6.03(0.8),
 

Physical Properties of Stibiomicrolite

Help on Color: Color: Greenish white, White.
Help on Diaphaniety: Diaphaniety: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Stibiomicrolite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.166 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.16,KC= 0.1919
Help on Optical Data: Optical Data: Isotropic, n=2.
 

Calculated Properties of Stibiomicrolite

Help on Electron Density: Electron Density:

relectron=5.48 gm/cc
note: rStibiomicrolite =6.25 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00022
Boson Index = 0.99978
Help on Photoelectric: Photoelectric:

PEStibiomicrolite = 587.05 barns/electron
U=PEStibiomicrolite x relectron=3,215.95 barns/cc.

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

Stibiomicrolite is Not Radioactive

 

Stibiomicrolite Classification

Help on  Dana Class: Dana Class: 8.2.2.7 (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
Help on  Strunz Class: Strunz Class: IV/C.18-30 IV - Oxides
  IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
  IV/C.18 - Pyrochlore group, Microlite series with Ta > Nb
 
IV/C.18-10 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m
 
IV/C.18-20 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.18-30 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.18-40 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.18-50 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m
 
IV/C.18-60 Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4O12 F d3m 4/m 3 2/m
 
IV/C.18-70 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m
 
IV/C.18-80 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m
 

Other Stibiomicrolite Information

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

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

Stibiomicrolite

(Sb,Ca,Na)2(Ta,Nb)2(O,OH)7
Dana No: 8.2.2.7 Strunz No: IV/C.18-30
Locality:

 

Notes:

 

 
   
 
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