Stannomicrolite Mineral Data
General Stannomicrolite Information
Chemical Formula:
(Sn++,Fe++,Mn++)(Ta,Nb,Sn++++)2(O,OH)7
Composition:
Molecular Weight = 637.44 gm
Tantalum 34.06 % Ta 41.59 % Ta2 O5
Titanium 0.75 % Ti 1.25 % TiO2
Manganese 0.86 % Mn 1.11 % MnO
Niobium 5.83 % Nb 8.34 % Nb2 O5
Iron 1.75 % Fe 2.25 % FeO
Tin 39.11 % Sn 35.93 % SnO / 9.46 % SnO2
Hydrogen 0.06 % H 0.57 % H2 O
Oxygen 17.57 % O
______ ______
100.00 % 100.50 % = TOTAL OXIDE
Empirical Formula:
Sn1.7 Fe2+ 0.2 Mn2+ 0.1 Ta1.2 Sn0.4 Nb0.4 Ti0.1 O6.6 (OH)0.4
Environment:
Replacing ferrowodginite inclusions in tantalian cassiterite, in a museum specimen from a granite pegmatite.
IMA Status:
Approved IMA 1977
Locality:
Sukula, Tammela, Finland. Link to MinDat.org Location Data.
Name Origin:
Named for tin (STANNum), in the formula and membership in the microlite subgroup of the pyrochlore group.
Name Pronunciation:
Stannomicrolite + Pronunciation
Synonym:
ICSD 38892
PDF 13-1441
Sukulaite
Stannomicrolite Image
Images:
Stannomicrolite Stokesite
Comments: Stokesite "ball" composed of lath-like tan or clear crystals with several micro crystals of yellow stannomicrolite.
Location: Urucum mine, Galileia, Minas Gerais, Brazil.
Scale: 1.2 cm.
© Tom Loomis / Dakota Matrix
Stannomicrolite Crystallography
Cell Dimensions:
a = 10.57, Z = 8; V = 1,180.93 Den(Calc)= 7.17
Crystal System:
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
X Ray Diffraction:
By Intensity(I/Io ): 3.05(1), 1.589(0.8), 1.866(0.8),
Physical Properties of Stannomicrolite
Color:
Yellow brown.
Density:
8.34
Diaphaneity:
Translucent
Fracture:
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:
Selvage - As a reaction rim, surrounding the host mineral.
Hardness:
4.5-5.5 - Near Apatite
Luster:
Adamantine
Optical Properties of Stannomicrolite
Gladstone-Dale:
CI meas = 0.202 (Poor) - where the CI = (1-KPDmeas /KC ) CI calc = 0.072 (Fair) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1506,KPDmeas = 0.1295,KC = 0.1623 Ncalc = 2.16 - 2.35
Optical Data:
Isotropic, n=2.08.
Calculated Properties of Stannomicrolite
Electron Density:
Bulk Density (Electron Density)=6.19 gm/cc note: Specific Gravity of Stannomicrolite =7.17 gm/cc.
Fermion Index:
Fermion Index = 0.06 Boson Index = 0.94
Photoelectric:
PEStannomicrolite = 541.28 barns/electronU=PEStannomicrolite x r Electron Density=3,352.27 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Stannomicrolite is Not Radioactive
Stannomicrolite Classification
Dana Class:
08.02.02.06 (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 Stannomicrolite Information
References:
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Stannomicrolite :
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
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Stannomicrolite
(Sn++,Fe++,Mn++)(Ta,Nb,Sn++++)2(O,OH)7
Dana No: 08.02.02.06 Strunz No: 04.DH.15
Locality:
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