Melanostibite Mineral Data

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.

Name Pronunciation:

Melanostibite + Pronunciation

Synonym:

ICSD 24431

PDF 20-699

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 - Rhombohedral H-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),

Physical Properties of Melanostibite

Cleavage:

{0001} Perfect

Color:

Black, Blood red.

Density:

5.63

Diaphaneity:

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
Ncalc = 2.1 - 2.14

Optical Data:

Uniaxial (?), b=2.12.

Calculated Properties of Melanostibite

Electron Density:

Bulk Density (Electron Density)=5.11 gm/cc
note: Specific Gravity of Melanostibite =5.63 gm/cc.

Fermion Index:

Fermion Index = 0.0025040795
Boson Index = 0.9974959205

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Melanostibite is Not Radioactive

Melanostibite Classification

Dana Class:

04.03.05.05 (04)Simple Oxides

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

(04.03.05)Ilmenite Group

04.03.05.01 Ilmenite FeTiO3 R 3 3

04.03.05.02 Geikielite MgTiO3 R 3 3

04.03.05.03 Pyrophanite MnTiO3 R 3 3

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

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

04.03.05.06 Brizziite-III NaSbO3 R 3 3

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

Strunz Class:

04.CB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.C - Metal:Oxygen = 2:3, 3:5, and Similar

04.CB -With medium-sized cations

04.CB.05 Auroantimonate* AuSbO3 Ortho ? Ortho

04.CB.05 Geikielite MgTiO3 R 3 3

04.CB.05 Brizziite-III NaSbO3 R 3 3

04.CB.05 Brizziite-VII NaSbO3 R 3 3

04.CB.05 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3

04.CB.05 Corundum Al2O3 R 3c 3 2/m

04.CB.05 Eskolaite Cr2O3 R 3c 3 2/m

04.CB.05 Hematite Fe2O3 R 3c 3 2/m

04.CB.05 Karelianite V2O3 R 3c 3 2/m

04.CB.05 Ilmenite FeTiO3 R 3 3

04.CB.05 Melanostibite Mn(Sb,Fe)O3 R 3 3

04.CB.05 Pyrophanite MnTiO3 R 3 3

04.CB.05 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig

04.CB.05 Tistarite! Ti2O3 R 3c 3 2/m

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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Melanostibite

Mn(Sb+++++,Fe+++)O3
Dana No: 04.03.05.05 Strunz No: 04.CB.05
Locality:

Notes:

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