Manganostibite Mineral Data

Manganostibite Mineral Data +

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General Manganostibite Information

Chemical Formula:

(Mn++,Fe++)7(SbO4)(AsO4,SiO4)O4

Composition:

Molecular Weight = 764.25 gm

Manganese 28.75 % Mn 37.13 % MnO

Iron 21.92 % Fe 28.20 % FeO

Silicon 0.92 % Si 1.97 % SiO₂

Antimony 15.93 % Sb 21.16 % Sb₂O₅

Arsenic 7.35 % As 11.28 % As₂O₅

Oxygen 25.12 % O

______ ______

100.00 % 99.74 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₄Fe²⁺₃(SbO₄)(AsO₄)_0.75(SiO₄)_0.25O₄

IMA Status:

Valid Species (Pre-IMA) 1884

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 15181

PDF 23-1236

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Manganostibite Crystallography

Axial Ratios:

a:b:c =0.4625:1:0.3214

Cell Dimensions:

a = 8.72, b = 18.85, c = 6.06, Z = 4; V = 996.09 Den(Calc)= 5.10

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Ibmm

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

By Intensity(I/I_o): 2.651(1), 4.38(0.6), 4.965(0.6),

Crystal Structure:

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Moore P B , American Mineralogist , 55 (1970) p.1489-1499, Manganostibite: A novel cubic close-packed structure type

Physical Properties of Manganostibite

Cleavage:

[???] Indistinct

Color:

Black.

Density:

4.949

Diaphaniety:

Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Luster:

Greasy (Oily)

Streak:

brown

Optical Properties of Manganostibite

Gladstone-Dale:

CI meas= -0.054 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.185,KPDmeas= 0.1906,KC= 0.1809

Optical Data:

Biaxial (-), a=1.92, b=1.95, g=1.96, bire=0.0400

Calculated Properties of Manganostibite

Electron Density:

r_electron=4.71 gm/cc
note: r_{Manganostibite}=5.10 gm/cc.

Fermion Index

Fermion Index = 0.00519
Boson Index = 0.99481

Photoelectric:

PE_{Manganostibite}= 70.43 barns/electron
U=PE_{Manganostibite} x r_electron= 332.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Manganostibite is Not Radioactive

Manganostibite Classification

Dana Class:

44.3.2.1 (44)Antimonates

(44.3)with miscellaneous formulae

(44.3.2)Dana Group

44.3.2.1 Manganostibite (Mn,Fe)7(SbO4)(AsO4,SiO4)O4 Ibmm 2/m 2/m 2/m

Strunz Class:

VIII/B.10-30 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6]

VIII/B.10 - Holdenite - Manganostibite series

VIII/B.10-10 Holdenite (Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8 Abma 2/m 2/m 2/m

VIII/B.10-20 Kolicite Mn7Zn4(AsO4)2(SiO4)2(OH)8 C mca 2/m 2/m 2/m

VIII/B.10-30 Manganostibite (Mn,Fe)7(SbO4)(AsO4,SiO4)O4 Ibmm 2/m 2/m 2/m

Other Manganostibite 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 Manganostibite :
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 Manganostibite Specimen Label here :

Manganostibite

(Mn++,Fe++)7(SbO4)(AsO4,SiO4)O4
Dana No: 44.3.2.1 Strunz No: VIII/B.10-30
Locality:

Notes: