Stetefeldtite Mineral Data

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.

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

Diaphaniety:

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

Optical Data:

Isotropic, n=1.95.

Calculated Properties of Stetefeldtite

Electron Density:

r_electron=4.75 gm/cc
note: r_{Stetefeldtite}=5.38 gm/cc.

Fermion Index

Fermion Index = 0.00009
Boson Index = 0.99991

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stetefeldtite is Not Radioactive

Stetefeldtite Classification

Dana Class:

44.1.1.5 (44)Antimonates

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

(44.1.1)Dana Group

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

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

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

44.1.1.3a Lewisite! (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m

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

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

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

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

Strunz Class:

IV/C.11-20 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.11 - Stibiconite group, Partzite - Bindheimite series

IV/C.11-10 Partzite Cu2Sb2(O,OH)7(?) F d3m 4/m 3 2/m

IV/C.11-20 Stetefeldtite Ag2Sb2O6(O,OH) F d3m 4/m 3 2/m

IV/C.11-30 Lewisite (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m

IV/C.11-40 Romeite (Ca,Fe,Mn,Na)2(Sb,Ti)2O6(O,OH,F) F d3m 4/m 3 2/m

IV/C.11-50 Stibiconite SbSb2O6(OH) F d3m 4/m 3 2/m

IV/C.11-60 Bismutostibiconite Bi(Sb,Fe)2O7 F d3m 4/m 3 2/m

IV/C.11-70 Bindheimite Pb2Sb2O6(O,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 - Crocoite.com Mineral Locations 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

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Stetefeldtite

Ag2Sb2O6(O,OH)
Dana No: 44.1.1.5 Strunz No: IV/C.11-20
Locality:

Notes: