Sanmartinite Mineral Data

Sanmartinite Mineral Data +

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General Sanmartinite Information

Chemical Formula:

(Zn,Fe++)WO4

Composition:

Molecular Weight = 310.85 gm

Zinc 15.78 % Zn 19.64 % ZnO

Iron 4.49 % Fe 5.78 % FeO

Tungsten 59.14 % W 74.58 % WO₃

Oxygen 20.59 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn_0.75Fe²⁺_0.25(WO₄)

IMA Status:

Valid Species (Pre-IMA) 1948

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 84540

PDF 15-774

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Sanmartinite Crystallography

Axial Ratios:

a:b:c =0.8193:1:0.8636

Cell Dimensions:

a = 4.68, b = 5.712, c = 4.933, Z = 2; beta = 90.3° V = 131.87 Den(Calc)= 7.83

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/c

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

By Intensity(I/I_o): 2.926(1), 1.7(0.6), 2.467(0.5),

Crystal Structure:

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Redfern S A T , Bell A M T , Henderson M B , Schofield P F , European Journal of Mineralogy , 7 (1995) p.1019-1028, Rietveld study of the structural phase transition in the, sanmartinite (ZnWO4)- cuproscheelite (CuWO4) solid solution, Sample: x=0.55

View Additional jPOWD Structure files for Sanmartinite
[1]

Physical Properties of Sanmartinite

Cleavage:

[010] Perfect

Color:

Brownish black, Dark brown.

Density:

6.7

Diaphaniety:

Transparent to Opaque

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Resinous

Streak:

red brown

Optical Properties of Sanmartinite

Gladstone-Dale:

CI meas= -0.114 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1616,KPDmeas= 0.1888,KC= 0.1694

Optical Data:

Biaxial (+), b=2.25-2.28

Calculated Properties of Sanmartinite

Electron Density:

r_electron=6.80 gm/cc
note: r_Sanmartinite=7.83 gm/cc.

Fermion Index

Fermion Index = 0.09197
Boson Index = 0.90803

Photoelectric:

PE_Sanmartinite= 744.89 barns/electron
U=PE_Sanmartinite x r_electron=5,066.01 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Sanmartinite is Not Radioactive

Sanmartinite Classification

Dana Class:

48.1.1.3 (48)Anhydrous Molybdates and Tungstates

(48.1)where A XO4

(48.1.1)Wolframite series

48.1.1.0 Wolframite* (Fe,Mn)WO4 P 2/c 2/m

48.1.1.1 Hubnerite MnWO4 P 2/c 2/m

48.1.1.2 Ferberite FeWO4 P 2/c 2/m

48.1.1.3 Sanmartinite (Zn,Fe)WO4 P 2/c 2/m

Strunz Class:

IV/D.16-30 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.16 - Wolframite series

IV/D.16-10 Hubnerite MnWO4 P 2/c 2/m

IV/D.16-20 Ferberite FeWO4 P 2/c 2/m

IV/D.16-30 Sanmartinite (Zn,Fe)WO4 P 2/c 2/m

IV/D.16-40 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc m

Other Sanmartinite Information

References:

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

See Also:

Links to other databases for Sanmartinite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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

Sanmartinite

(Zn,Fe++)WO4
Dana No: 48.1.1.3 Strunz No: IV/D.16-30
Locality:

Notes: