Hexaferrum Mineral Data

Hexaferrum Mineral Data

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General Hexaferrum Information

Chemical Formula:

(Fe,Os,Ru,Ir)

Composition:

Molecular Weight = 86.51 gm

Iron 41.96 % Fe

Iridium 31.11 % Ir

Osmium 17.59 % Os

Ruthenium 9.35 % Ru

______

100.00 %

Empirical Formula:

Fe⁰⁺_0.65Ir_0.14Os_0.08Ru_0.08

Environment:

Found in chromite segregations in dunite.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

The Chirynaisky massif, Koryak Mountains, Kamchatka, Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the symmetry and composition.

Synonym:

IMA1995-032

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Hexaferrum Crystallography

Axial Ratios:

a:c = 1:1.60864

Cell Dimensions:

a = 2.591, c = 4.168, Z = 2; V = 24.23 Den(Calc)= 11.86

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 1.976(1), 1.297(0.6), 2.087(0.6),

Physical Properties of Hexaferrum

Cleavage:

None

Color:

Yellowish steel gray.

Diaphaniety:

Opaque

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Hardness:

6-7 - Orthoclase-Quartz

Luster:

Metallic

Streak:

black

Optical Properties of Hexaferrum

RL Anisotrophism:

Weak.

RL Bireflectance:

None.

RL Color:

White.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Hexaferrum in Air**
λ	R	∑ R(λ)
480 nm	55.10
560 nm	53.40
580 nm	53.20
660 nm	54.70

**Calculated Relative Intensity Colors of Hexaferrum in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	170%
R

Calculated Properties of Hexaferrum

Electron Density:

r_electron=10.2 gm/cc
note: r_Hexaferrum=11.9 gm/cc.

Fermion Index

Fermion Index = 0.06787
Boson Index = 0.93213

Photoelectric:

PE_Hexaferrum= 721.29 barns/electron
U=PE_Hexaferrum x r_electron=7,372.56 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hexaferrum is Not Radioactive

Hexaferrum Classification

Dana Class:

1.2.2.4 (1)Native Elements

(1.2)with platinum group metals and alloys

(1.2.2)Osmium group (Space Group P63/mmc)

1.2.2.1 Osmium (Os,Ir) P 6₃/mmc 6/m 2/m 2/m

1.2.2.2 Ruthenium (Ru,Ir,Os) P 6₃/mmc 6/m 2/m 2/m

1.2.2.3 Rutheniridosmine (Ir,Os,Ru) P 6₃/mmc 6/m 2/m 2/m

1.2.2.4 Hexaferrum ! (Fe,Os,Ru,Ir) P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

I/A.13-15 I - Elements

I/A - Metallic and intermetallic compounds, Carbides, Nitrides, Phosphides and Silicides

I/A.13 - Osmium series

I/A.13-10 Rhenium* Re P 6₃/mmc 6/m 2/m 2/m

I/A.13-15 Hexaferrum (Fe,Os,Ru,Ir) P 6₃/mmc 6/m 2/m 2/m

I/A.13-20 Osmium (Os,Ir) P 6₃/mmc 6/m 2/m 2/m

I/A.13-30 Ruthenium (Ru,Ir,Os) P 6₃/mmc 6/m 2/m 2/m

I/A.13-40 Rutheniridosmine (Ir,Os,Ru) P 6₃/mmc 6/m 2/m 2/m

Other Hexaferrum Information

References:

NAME( MinRec, V. 31, No. 2) PHYS. PROP.(MinRec, V 31, No. 2) OPTIC PROP.(AmMin,v 84, p 1686)

See Also:

Links to other databases for Hexaferrum :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Hexaferrum

(Fe,Os,Ru,Ir)
Dana No: 1.2.2.4 Strunz No: I/A.13-15
Locality:

Notes: