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 % Ta₂O₅

Titanium 0.75 % Ti 1.25 % TiO₂

Manganese 0.86 % Mn 1.11 % MnO

Niobium 5.83 % Nb 8.34 % Nb₂O₅

Iron 1.75 % Fe 2.25 % FeO

Tin 39.11 % Sn 35.93 % SnO / 9.46 % SnO₂

Hydrogen 0.06 % H 0.57 % H₂O

Oxygen 17.57 % O

______ ______

100.00 % 100.50 % = TOTAL OXIDE

Empirical Formula:

Sn_1.7Fe²⁺_0.2Mn²⁺_0.1Ta_1.2Sn_0.4Nb_0.4Ti_0.1O_6.6(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:

Click Here for Larger Stannomicrolite Image

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 - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

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

By Intensity(I/I_o): 3.05(1), 1.589(0.8), 1.866(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Gasperin M , Comptes Rendus Hebdomadaires des Seances de l Academie des Sciences , 240 (1955) p.2340-2342, Synthese et identification de deux oxydes doubles de tantale et d etain, Sample: synthetic

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:

PE_{Stannomicrolite}= 541.28 barns/electron
U=PE_{Stannomicrolite} x rElectron 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

Search for Stannomicrolite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Stannomicrolite :

A Bijoux Google Search for Stannomicrolite
Adam's Minerals Google Search for Stannomicrolite
Cape Minerals Google Search for Stannomicrolite
Dakota Matrix Minerals Google Search for Stannomicrolite
Excalibur Mineral Corp. Google Search for Stannomicrolite
Exceptional Minerals Google Search for Stannomicrolite
John Betts Fine Minerals Search for Stannomicrolite
McDougall Minerals Google Search for Stannomicrolite
Mineral News Website Link
Rock and Mineral Shows Google Search for Stannomicrolite
Weinrich Minerals, Inc. Google Search for Stannomicrolite

Ask about Stannomicrolite 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 Stannomicrolite Specimen Label here :

Stannomicrolite

(Sn++,Fe++,Mn++)(Ta,Nb,Sn++++)2(O,OH)7
Dana No: 08.02.02.06 Strunz No: 04.DH.15
Locality:

Notes: