Filipstadite Mineral Data

General Filipstadite Information

Chemical Formula:

(Mn++,Mg)4Sb+++++Fe+++O8

Composition:

Molecular Weight = 475.43 gm

Magnesium 7.67 % Mg 12.72 % MgO

Manganese 28.89 % Mn 37.30 % MnO

Aluminum 0.34 % Al 0.64 % Al₂O₃

Iron 10.57 % Fe 15.12 % Fe₂O₃

Antimony 25.61 % Sb 34.02 % Sb₂O₅

Oxygen 26.92 % O

______ ______

100.00 % 99.80 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_2.5Mg_1.5Fe³⁺_0.9SbAl_0.06O₈

Environment:

Metamorphosed Fe-Mn deposits.

IMA Status:

Approved IMA 1988

Locality:

Langban and Jakobsberg, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for the town of Filipstad, Sweden, which is near the mine.

Name Pronunciation:

Filipstadite + Pronunciation

Filipstadite Image

Images:

Click Here for Larger Filipstadite Image

Filipstadite Hausmannite

Comments: Dark minute grains of filipstadtite in hausmannite (slabbed specimen).
Location: Jacobsberg Mine, near Nordmark, Filipstad, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Filipstadite Crystallography

Axial Ratios:

a:b:c =1:1:0.7057

Cell Dimensions:

a = 36.7, b = 36.7, c = 25.9, Z = 216; V = 34,884.45 Den(Calc)= 4.89

Crystal System:

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

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

By Intensity(I/I_o): 2.56(1), 1.527(0.7), 1.662(0.6),2.157(0.4), 1.1251(0.3), 3.05(0.3), 4.97(0.2),

Crystal Structure:

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Dunn P J , Peacor D R , Criddle A J , Stanley C J , American Mineralogist , 73 (1988) p.413-419, Filipstadite, a new Mn-Fe3+-Sb derivative of spinel, from Lanban, Sweden, Locality: Langban, Varmland, Sweden, Note: cubic subcell, O arbitrarily placed in ideal eutactic position

Physical Properties of Filipstadite

Cleavage:

None

Color:

Black, Dark brownish gray.

Diaphaneity:

Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Pseudo Octohedral - Crystals show an octohedral outline.

Hardness:

6-6.5 - Orthoclase-Pyrite

Luster:

Metallic

Streak:

brown

Optical Properties of Filipstadite

Optical Data:

Biaxial (?)

NCalc= 1.98 - from Gladstone-Dale relationship (KC = 0.1999) where Ncalc=Dcalc*KC+1

RL Anisotrophism:

Weak, in shades of dark brownish gray.

RL Color:

Gray, with amber-orange, brown, or red internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Filipstadite in Air**
λ	R	∑ R(λ)
400 nm	12.80
420 nm	12.50
440 nm	12.40
460 nm	12.20
480 nm	12.00
500 nm	11.90
520 nm	11.80
540 nm	11.70
560 nm	11.60
580 nm	11.60
600 nm	11.60
620 nm	11.60
640 nm	11.50
660 nm	11.50
680 nm	11.40
700 nm	11.40

**Calculated Relative Intensity Colors of Filipstadite in Air**
Relative Intensity	0%	80%	100%	160%	240%	320%	400%	480%	560%	640%	720%	760%
R

Calculated Properties of Filipstadite

Electron Density:

Bulk Density (Electron Density)=4.52 gm/cc
note: Specific Gravity of Filipstadite =4.89 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Filipstadite= 92.73 barns/electron
U=PE_Filipstadite x rElectron Density= 419.07 barns/cc.

Radioactivity:

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

Filipstadite Classification

Dana Class:

07.02.13.01 (07)Multiple Oxides

(07.02)(A+ B++)2 X4 Spinel group

(07.02.13)Dana Group

07.02.13.01 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m

07.02.13.02 Tegengrenite! (Mg,Mn)2Sb0.5(Mn,Si,Ti)0.5O4 R 3 or R 3- Trig

Strunz Class:

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

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

04.BB -With only medium-sized cations

04.BB.05 Cochromite (Co,Ni,Fe)(Cr,Al)2O4 F d3m 4/m 3 2/m

04.BB.05 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m

04.BB.05 Magnetite FeFe2O4 F d3m 4/m 3 2/m

04.BB.05 Gahnite ZnAl2O4 F d3m 4/m 3 2/m

04.BB.05 Chromite FeCr2O4 F d3m 4/m 3 2/m

04.BB.05 Galaxite (Mn,Mg)(Al,Fe)2O4 F d3m 4/m 3 2/m

04.BB.05 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m

04.BB.05 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m

04.BB.05 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m

04.BB.05 Coulsonite FeV2O4 F d3m 4/m 3 2/m

04.BB.05 Hercynite FeAl2O4 F d3m 4/m 3 2/m

04.BB.05 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m

04.BB.05 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m

04.BB.05 Magnesiochromite MgCr2O4 F d3m 4/m 3 2/m

04.BB.05 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m

04.BB.05 Magnesiocoulsonite MgV2O4 F d3m 4/m 3 2/m

04.BB.05 Manganochromite (Mn,Fe)(Cr,V)2O4 F d3m 4/m 3 2/m

04.BB.05 Qandilite (Mg,Fe)2(Ti,Fe,Al)O4 F d3m 4/m 3 2/m

04.BB.05 Nichromite (Ni,Co,Fe)(Cr,Fe,Al)2O4 F d3m 4/m 3 2/m

04.BB.05 Spinel MgAl2O4 F d3m 4/m 3 2/m

04.BB.05 Ulvospinel TiFe2O4 F d3m 4/m 3 2/m

04.BB.05 Zincochromite ZnCr2O4 F d3m 4/m 3 2/m

04.BB.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m

04.BB.05 Vuorelainenite (Mn,Fe)(V,Cr)2O4 F d3m 4/m 3 2/m

Other Filipstadite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Filipstadite :
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

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

Filipstadite

(Mn++,Mg)4Sb+++++Fe+++O8
Dana No: 07.02.13.01 Strunz No: 04.BB.05
Locality:

Notes: