Stetefeldtite Mineral Data

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General Stetefeldtite Information

Chemical Formula:

Ag2Sb2O6(O,OH)

Composition:

Molecular Weight = 571.74 gm

Silver 37.73 % Ag 40.53 % Ag₂O

Antimony 42.59 % Sb 56.58 % Sb₂O₅

Hydrogen 0.09 % H 0.79 % H₂O

Oxygen 19.59 % O

______ ______

100.00 % 97.90 % = TOTAL OXIDE

Empirical Formula:

Ag₂Sb₂O_6.5(OH)_0.5

IMA Status:

Valid Species (Pre-IMA) 1867

Locality:

Belmont, Nye County, Montanta, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Carl A. Stetefeld (1838-1896), German-American mining engineer.

Name Pronunciation:

Stetefeldtite + Pronunciation

Synonym:

Stetfeldtite

Stetefeldtite Image

Images:

Stetefeldtite

Comments: Light yellow, massive, earthy stetefeldtite aggregates.
Location: Snyder Hill Mine, Tucson Mountains, Pima Co., Arizona, USA. Scale: 2.5x2x1cm.
© Tom Loomis / Dakota Matrix

Stetefeldtite Crystallography

Cell Dimensions:

a = 10.46, Z = 6; V = 1,144.45 Den(Calc)= 4.98

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): 3.02(1), 1.85(0.7), 2.61(0.7),

Physical Properties of Stetefeldtite

Color:

Black, Brown, Yellowish.

Density:

5.38

Diaphaneity:

Translucent to Opaque

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

3.5-4.5 - Between Copper Penny and Fluorite-Apatite

Luster:

Earthy (Dull)

Streak:

yellow

Optical Properties of Stetefeldtite

Gladstone-Dale:

CI meas= -0.122 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.212 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1908,KPDmeas= 0.1766,KC= 0.1573
Ncalc = 1.78 - 1.85

Optical Data:

Isotropic, n=1.95.

Calculated Properties of Stetefeldtite

Electron Density:

Bulk Density (Electron Density)=4.75 gm/cc
note: Specific Gravity of Stetefeldtite =5.38 gm/cc.

Fermion Index:

Fermion Index = 0.0000941581
Boson Index = 0.9999058419

Photoelectric:

PE_{Stetefeldtite}= 239.21 barns/electron
U=PE_{Stetefeldtite} x rElectron Density=1,136.71 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stetefeldtite is Not Radioactive

Stetefeldtite Classification

Dana Class:

44.01.01.05 (44)Antimonates

(44.01)(A)2 (X2 O6) (O,OH,F)

(44.01.01)Stibiconite Group

44.01.01.01 Stibiconite SbSb2O6(OH) F d3m 4/m 3 2/m

44.01.01.02 Bindheimite Pb2Sb2O6(O,OH) F d3m 4/m 3 2/m

44.01.01.03 Romeite (Ca,Fe,Mn,Na)2(Sb,Ti)2O6(O,OH,F) F d3m 4/m 3 2/m

44.01.01.03a Lewisite? (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m

44.01.01.04 Monimolite (Pb,Ca)2Sb2O7 F d3m 4/m 3 2/m

44.01.01.05 Stetefeldtite Ag2Sb2O6(O,OH) F d3m 4/m 3 2/m

44.01.01.06 Bismutostibiconite Bi(Sb,Fe)2O7 F d3m 4/m 3 2/m

44.01.01.07 Partzite Cu2Sb2(O,OH)7(?) F d3m 4/m 3 2/m

Strunz Class:

04.DH.20 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.20 Bismutostibiconite Bi(Sb,Fe)2O7 F d3m 4/m 3 2/m

04.DH.20 Bindheimite Pb2Sb2O6(O,OH) F d3m 4/m 3 2/m

04.DH.20 Monimolite (Pb,Ca)2Sb2O7 F d3m 4/m 3 2/m

04.DH.20 Partzite Cu2Sb2(O,OH)7(?) F d3m 4/m 3 2/m

04.DH.20 Stetefeldtite Ag2Sb2O6(O,OH) F d3m 4/m 3 2/m

04.DH.20 Romeite (Ca,Fe,Mn,Na)2(Sb,Ti)2O6(O,OH,F) F d3m 4/m 3 2/m

04.DH.20 Stibiconite SbSb2O6(OH) F d3m 4/m 3 2/m

Other Stetefeldtite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Stetefeldtite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - Handbook of Mineralogy (MinSocAm)
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info

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Stetefeldtite

Ag2Sb2O6(O,OH)
Dana No: 44.01.01.05 Strunz No: 04.DH.20
Locality:

Notes: