Filipstadite Mineral Data

Filipstadite Mineral Data +

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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.

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),

Physical Properties of Filipstadite

Cleavage:

None

Color:

Black, Dark brownish gray.

Diaphaniety:

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:

r_electron=4.52 gm/cc
note: r_Filipstadite=4.89 gm/cc.

Fermion Index

Fermion Index = 0.01003
Boson Index = 0.98997

Photoelectric:

PE_Filipstadite= 92.73 barns/electron
U=PE_Filipstadite x r_electron= 419.07 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Filipstadite is Not Radioactive

Filipstadite Classification

Dana Class:

7.2.13.1 (7)Multiple Oxides

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

(7.2.13)Dana Group

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

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

Strunz Class:

IV/B.05-80 IV - Oxides

IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related)

IV/B.05 - Hausmannite - Filipstadite series

IV/B.05-10 Hausmannite MnMn2O4 I 4₁/amd 4/m 2/m 2/m

IV/B.05-20 Iwakiite Mn(Fe,Mn)2O4 P 4₁/nnm 4/m 2/m 2/m

IV/B.05-30 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m

IV/B.05-40 Hetaerolite ZnMn2O4 I 4₁/amd 4/m 2/m 2/m

IV/B.05-50 Hydrohetaerolite Zn2Mn4O8·(H2O) I 4₁/amd 4/m 2/m 2/m

IV/B.05-60 Marokite CaMn2O4 Pmab 2/m 2/m 2/m

IV/B.05-65 Tegengrenite! (Mg,Mn)2Sb0.5(Mn,Si,Ti)0.5O4 R 3 or R 3- Trig

IV/B.05-80 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 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 -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 -École des Mines de Paris

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Translate Filipstadite Mineral Data :

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

Filipstadite

(Mn++,Mg)4Sb+++++Fe+++O8
Dana No: 7.2.13.1 Strunz No: IV/B.05-80
Locality:

Notes: