Ruarsite Mineral Data

Ruarsite Mineral Data +

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General Ruarsite Information

Chemical Formula:

RuAsS

Composition:

Molecular Weight = 208.06 gm

Arsenic 36.01 % As

Ruthenium 48.58 % Ru

Sulfur 15.41 % S

______

100.00 %

Empirical Formula:

RuAsS

Environment:

Found in heavy mineral concentrates and in chromium ore derived from an Alpine-type ultramafic.

IMA Status:

Approved IMA 1979

Locality:

Anduo, northern Tibet, China Link to MinDat.org Location Data.

Name Origin:

Named for the composition, RUthenium, ARsenic, and Sulfur.

Synonym:

ICSD 42579

PDF 27-568

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Ruarsite Crystallography

Axial Ratios:

a:b:c =1.0027:1:1.0148

Cell Dimensions:

a = 5.931, b = 5.915, c = 6.003, Z = 4; beta = 112.45° V = 194.64 Den(Calc)= 7.10

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 2.74(1), 2.77(1), 1.87(0.9),

Physical Properties of Ruarsite

Cleavage:

None

Color:

Gray, Dark lead gray.

Diaphaniety:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Hardness:

6-7 - Orthoclase-Quartz

Luster:

Metallic

Streak:

grayish black

Optical Properties of Ruarsite

RL Anisotrophism:

Distinct, bluish gray to light reddish.

RL Color:

Grayish white.

RL Pleochroism:

Pale yellowish white to light grayish yellow-white.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Ruarsite in Air**
λ	R	∑ R(λ)
480 nm	43.40
546 nm	44.10
589 nm	43.80
656 nm	45.10

**Calculated Relative Intensity Colors of Ruarsite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%
R

Calculated Properties of Ruarsite

Electron Density:

r_electron=6.35 gm/cc
note: r_Ruarsite=7.10 gm/cc.

Fermion Index

Fermion Index = 0.14591
Boson Index = 0.85409

Photoelectric:

PE_Ruarsite= 124.48 barns/electron
U=PE_Ruarsite x r_electron= 790.13 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ruarsite is Not Radioactive

Ruarsite Classification

Dana Class:

2.12.4.4 (2)Sulfides - Including Selenides and Tellurides

(2.12)where Am Bn Xp, with (m+n):p=1:2

(2.12.4)Arsenopyrite Group (Monoclinic: P21/c (Pseudo-orthorhombic))

2.12.4.1 Arsenopyrite FeAsS P 2₁/c 2/m

2.12.4.2 Gudmundite FeSbS P 2₁/n 2/m

2.12.4.3 Osarsite (Os,Ru)AsS P 2₁/c 2/m

2.12.4.4 Ruarsite RuAsS P 2₁/c 2/m

2.12.4.5 Iridarsenite (Ir,Ru)As2 P 2₁/c 2/m

2.12.4.6 Clinosafflorite (Co,Fe,Ni)As2 P 2₁/n 2/m

Strunz Class:

II/D.22-40 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.22 - Arsenopyrite series

II/D.22-10 Arsenopyrite FeAsS P 2₁/c 2/m

II/D.22-20 Glaucodot (Co,Fe)AsS C mmm 2/m 2/m 2/m

II/D.22-30 Gudmundite FeSbS P 2₁/n 2/m

II/D.22-40 Ruarsite RuAsS P 2₁/c 2/m

II/D.22-50 Osarsite (Os,Ru)AsS P 2₁/c 2/m

II/D.22-60 Alloclasite (Co,Fe)AsS P 22121 2 2 2

Other Ruarsite Information

References:

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

See Also:

Links to other databases for Ruarsite :
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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Print or Cut-and-Paste your Ruarsite Specimen Label here :

Ruarsite

RuAsS
Dana No: 2.12.4.4 Strunz No: II/D.22-40
Locality:

Notes: