Mopungite Mineral Data

Mopungite Mineral Data +

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General Mopungite Information

Chemical Formula:

NaSb(OH)6

Composition:

Molecular Weight = 246.78 gm

Sodium 9.32 % Na 12.56 % Na₂O

Antimony 49.33 % Sb 65.54 % Sb₂O₅

Hydrogen 2.45 % H 21.90 % H₂O

Oxygen 38.90 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaSb(OH)₆

Environment:

Secondary mineral from stibnite.

IMA Status:

Approved IMA 1985

Locality:

Mopung Hills, Churchill County, Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 4211

PDF 38-411

Mopungite Image

Images:

Mopungite

Comments: White mopungite encrustations.
Location: Cetine di Cotorniano Mine (Cetine Mine), Rosia, Siena, Tuscany, Italy. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Mopungite Crystallography

Axial Ratios:

a:c = 1:0.98311

Cell Dimensions:

a = 7.994, c = 7.859, Z = 4; V = 502.22 Den(Calc)= 3.26

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: P 4₁/n

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

By Intensity(I/I_o): 4.58(1), 3.985(0.8), 1.205(0.7),

Crystal Structure:

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Schrewelius N , Zeitschrift fur Anorganische und Allgemeine Chemie , 238 (1938) p.241-254, Rontgenuntersuchung der verbindungen NaSb(OH)6, NaSbF6, NaSbO3 und gleichartiger stoffe

Physical Properties of Mopungite

Cleavage:

None

Color:

Colorless, Milky white.

Density:

3.21

Diaphaniety:

Transparent to Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Habit:

Pseudomorphous - Occurs in the form of another mineral.

Hardness:

3 - Calcite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Mopungite

Gladstone-Dale:

CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.059 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.187,KPDmeas= 0.1899,KC= 0.1986

Optical Data:

Uniaxial (-), e=1.605, w=1.614, bire=0.0090.

Calculated Properties of Mopungite

Electron Density:

r_electron=3.02 gm/cc
note: r_Mopungite=3.21 gm/cc.

Fermion Index

Fermion Index = 0.00019
Boson Index = 0.99981

Photoelectric:

PE_Mopungite= 154.60 barns/electron
U=PE_Mopungite x r_electron= 466.52 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Mopungite is Not Radioactive

Mopungite Classification

Dana Class:

6.3.7.4 (6)Hydroxides and Oxides Containing Hydroxyl

(6.3)with (OH)3 or (OH)6 groups

(6.3.7)Wickmanite group (Tetragonal: P42/n)

6.3.7.1 Stottite FeGe(OH)6 P 4₁/n 4/m

6.3.7.2 Tetrawickmanite MnSn(OH)6 P 4₁/n 4/m

6.3.7.3 Jeanbandyite (Fe,Mn)Sn(OH)6 P 4₁/n 4/m

6.3.7.4 Mopungite NaSb(OH)6 P 4₁/n 4/m

Strunz Class:

IV/F.17-10 IV - Oxides

IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure

IV/F.17 - Stottite group, Mopungite - Stottite series

IV/F.17-10 Mopungite NaSb(OH)6 P 4₁/n 4/m

IV/F.17-20 Tetrawickmanite MnSn(OH)6 P 4₁/n 4/m

IV/F.17-30 Jeanbandyite (Fe,Mn)Sn(OH)6 P 4₁/n 4/m

IV/F.17-40 Stottite FeGe(OH)6 P 4₁/n 4/m

IV/F.17-50 Eyselite! FeGe3O7(OH) P*** Ortho

Other Mopungite 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 Mopungite :
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 -École des Mines de Paris

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

Mopungite

NaSb(OH)6
Dana No: 6.3.7.4 Strunz No: IV/F.17-10
Locality:

Notes: