Melanostibite Mineral Data

Melanostibite Mineral Data +

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General Melanostibite Information

Chemical Formula:

Mn(Sb+++++,Fe+++)O3

Composition:

Molecular Weight = 198.33 gm

Manganese 27.70 % Mn 35.77 % MnO

Iron 11.26 % Fe 16.10 % Fe₂O₃

Antimony 36.83 % Sb 48.93 % Sb₂O₅

Oxygen 24.20 % O

______ ______

100.00 % 100.81 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺Sb_0.6Fe³⁺_0.4O₃

Environment:

Fissures in banded dolomite, in a small Fe-Mn orebody in manganoan dolomite.

IMA Status:

Valid Species (Pre-IMA) 1892

Locality:

Sjo mine, near Grythyttan, Orebro, Sweden. Link to MinDat.org Location Data.

Name Origin:

From the Greek for "black" and antimony (STIBium) in its composition.

Synonym:

ICSD 24431

PDF 20-699

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Melanostibite Crystallography

Axial Ratios:

a:c = 1:2.7411

Cell Dimensions:

a = 5.226, c = 14.325, Z = 6; V = 338.82 Den(Calc)= 5.83

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 2.806(1), 1.766(0.8), 2.613(0.8),

Crystal Structure:

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Moore P B , American Mineralogist , 53 (1968) p.1104-1109, Substitutions of the type (Sb0.5Fe0.5)-(Ti): The crystal structure of, melanostibite

Physical Properties of Melanostibite

Cleavage:

[0001] Perfect

Color:

Black, Blood red.

Density:

5.63

Diaphaniety:

Transparent to Subtranslucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Hardness:

4 - Fluorite

Luster:

Sub Metallic

Streak:

cherry

Optical Properties of Melanostibite

Gladstone-Dale:

CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1921,KPDmeas= 0.1989,KC= 0.1961

Optical Data:

Uniaxial (?), b=2.12.

Calculated Properties of Melanostibite

Electron Density:

r_electron=5.11 gm/cc
note: r_{Melanostibite}=5.63 gm/cc.

Fermion Index

Fermion Index = 0.0025
Boson Index = 0.9975

Photoelectric:

PE_{Melanostibite}= 130.50 barns/electron
U=PE_{Melanostibite} x r_electron= 666.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Melanostibite is Not Radioactive

Melanostibite Classification

Dana Class:

4.3.5.5 (4)Simple Oxides

(4.3)with a cation charge of 3+ (A+++2 O3)

(4.3.5)Dana Group

4.3.5.1 Ilmenite FeTiO3 R 3 3

4.3.5.2 Geikielite MgTiO3 R 3 3

4.3.5.3 Pyrophanite MnTiO3 R 3 3

4.3.5.4 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3

4.3.5.5 Melanostibite Mn(Sb,Fe)O3 R 3 3

4.3.5.6 Brizziite-III NaSbO3 R 3 3

4.3.5.7 Akimotoite! (Mg,Fe)SiO3 R 3 3

Strunz Class:

IV/C.05-50 IV - Oxides

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

IV/C.05 - Ilmenite group, Geikilith - Brizziite series

IV/C.05-05 Akimotoite! (Mg,Fe)SiO3 R 3 3

IV/C.05-10 Geikielite MgTiO3 R 3 3

IV/C.05-20 Ilmenite FeTiO3 R 3 3

IV/C.05-30 Pyrophanite MnTiO3 R 3 3

IV/C.05-40 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3

IV/C.05-50 Melanostibite Mn(Sb,Fe)O3 R 3 3

IV/C.05-60 Brizziite-III NaSbO3 R 3 3

IV/C.05-60* Brizziite-VII NaSbO3 R 3 3

Other Melanostibite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Melanostibite :
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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Melanostibite

Mn(Sb+++++,Fe+++)O3
Dana No: 4.3.5.5 Strunz No: IV/C.05-50
Locality:

Notes: