Heideite Mineral Data

General Heideite Information

Chemical Formula:

(Fe,Cr)1+x(Ti,Fe)2S4

Composition:

Molecular Weight = 292.66 gm

Titanium 27.81 % Ti

Chromium 3.55 % Cr

Iron 24.81 % Fe

Sulfur 43.83 % S

______

100.00 %

Empirical Formula:

Fe²⁺Cr_0.2Ti_1.7Fe²⁺_0.3S₄

Environment:

In meteorites recovered on Earth.

IMA Status:

Approved IMA 1974

Locality:

Bustee enstatite achondrite meteor. Link to MinDat.org Location Data.

Name Origin:

Named for Fritz Heide (1891-1973), meteoriticist of Jana, Germany.

Name Pronunciation:

Heideite

Synonym:

ICSD 42563

PDF 20-1303

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Heideite Crystallography

Axial Ratios:

a:b:c =1.7456:1:3.3333

Cell Dimensions:

a = 5.97, b = 3.42, c = 11.4, Z = 2; beta = 90.2° V = 232.76 Den(Calc)= 4.18

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m

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

By Intensity(I/I_o): 2.06(1), 1.72(0.75), 2.64(0.75),

Crystal Structure:

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Takahashi T , Yamada O , Journal of Solid State Chemistry , 7 (1973) p.25-30, Crystallographic and magnetic properties of the Cd(OH)2, layer structure compound TiS2 containing extra iron, Locality: synthetic

Physical Properties of Heideite

Cleavage:

None

Color:

Steel gray.

Density:

4.1

Diaphaneity:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

3.5-4.5 - Between Copper Penny and Fluorite-Apatite

Luster:

Metallic

Optical Properties of Heideite

RL Color:

Creamy white.

RL Pleochroism:

Moderately strong, from purple-gray to cream-gray.

Calculated Properties of Heideite

Electron Density:

Bulk Density (Electron Density)=4.00 gm/cc
note: Specific Gravity of Heideite =4.18 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Heideite= 15.30 barns/electron
U=PE_Heideite x rElectron Density= 61.21 barns/cc.

Radioactivity:

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

Heideite Classification

Dana Class:

02.10.02.03 (02)Sulfides - Including Selenides and Tellurides

(02.10)where Am Bn Xp, with (m+n):p=3:4

(02.10.02)Wilkmanite Group

02.10.02.01 Wilkmanite Ni3Se4 I2/m 2/m

02.10.02.02 Brezinaite Cr3S4 I2/m 2/m

02.10.02.03 Heideite (Fe,Cr)1x(Ti,Fe)2S4 I2/m 2/m

02.10.02.04 Kingstonite! (Rh,Ir,Pt)3S4 C 2/m 2/m

Strunz Class:

02.DA.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.D - Metal Sulfides, M:S = 3:4 and 2:3

02.DA -M:S = 3:4

02.DA.15 Brezinaite Cr3S4 I2/m 2/m

02.DA.15 Heideite (Fe,Cr)1x(Ti,Fe)2S4 I2/m 2/m

02.DA.15 Wilkmanite Ni3Se4 I2/m 2/m

Other Heideite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Heideite :
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 Heideite Specimen Label here :

Heideite

(Fe,Cr)1+x(Ti,Fe)2S4
Dana No: 02.10.02.03 Strunz No: 02.DA.15
Locality:

Notes: