Manganostibite Mineral Data

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

Environment:

Late-stage hydrothermal veins in manganese deposits in limestone.

IMA Status:

Valid Species (Pre-IMA) 1884

Locality:

Moss and Brattfors mines, near Nordmark, Vï¿½armland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for the MANGANese and antimony, STIBium, in the composition.

Name Pronunciation:

Manganostibite

Synonym:

ICSD 15181

PDF 23-1236

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 - Dipyramidal H-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),

Physical Properties of Manganostibite

Cleavage:

{???} Indistinct

Color:

Black.

Density:

4.949

Diaphaneity:

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
Ncalc = 1.9 - 1.92

Optical Data:

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

Calculated Properties of Manganostibite

Electron Density:

Bulk Density (Electron Density)=4.71 gm/cc
note: Specific Gravity of Manganostibite =5.10 gm/cc.

Fermion Index:

Fermion Index = 0.0051971624
Boson Index = 0.9948028376

Photoelectric:

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

Radioactivity:

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

Manganostibite Classification

Dana Class:

44.03.02.01 (44)Antimonates

(44.03)with miscellaneous formulae

(44.03.02)Dana Group

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

Strunz Class:

04.BA.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.B - Metal:Oxygen = 3:4 and similar

04.BA -With small and medium-sized cations

04.BA.10 Manganostibite (Mn,Fe)7(SbO4)(AsO4,SiO4)O4 Ibmm 2/m 2/m 2/m

Other Manganostibite Information

References:

NAME( AntBidBlaNic4) 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 - 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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Print or Cut-and-Paste your Manganostibite Specimen Label here :

Manganostibite

(Mn++,Fe++)7(SbO4)(AsO4,SiO4)O4
Dana No: 44.03.02.01 Strunz No: 04.BA.10
Locality:

Notes:

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