Stibarsen Mineral Data

Stibarsen Mineral Data +

General Stibarsen Information

Chemical Formula:

SbAs

Composition:

Molecular Weight = 196.67 gm

Antimony 61.91 % Sb

Arsenic 38.09 % As

______

100.00 %

Empirical Formula:

SbAs

Environment:

Hydrothermal veins and granite pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1941

Locality:

Varuträsk pegmatite, Boliden, Skellefteå, Västerbotten, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for its composition of antimony (Latin=stibium) and arsenic.

Synonym:

Allemontite

ICSD 42576

PDF 31-80

Stibarsen Image

Images:

Stibarsen

Comments: Massive Stibarsen.
Location: Bohemia, Czechoslovakia. Scale: 3 x 2 cm.
© John Veevaert

Stibarsen Crystallography

Axial Ratios:

a:c = 1:2.68656

Cell Dimensions:

a = 4.02, c = 10.8, Z = 3; V = 151.15 Den(Calc)= 6.48

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 2.92(1), 2.01(0.7), 2.13(0.6),

Crystal Structure:

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Bayless P , American Mineralogist , 76 (1991) p.257-265, Crystal chemistry and crystallography of some minerals in the tetradymite group

Physical Properties of Stibarsen

Cleavage:

[???] Perfect

Color:

White, Gray, Grayish white, Reddish white.

Density:

6.1 - 6.2, Average = 6.15

Diaphaniety:

Opaque

Habit:

Reniform - "Kidney like" in shape (e.g.. hematite).

Hardness:

3-4 - Calcite-Fluorite

Luminescence:

Non-fluorescent.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

grayish black

Optical Properties of Stibarsen

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Stibarsen in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	64.80	67.80
420 nm	65.00	68.00
440 nm	65.20	68.20
460 nm	64.80	67.90
480 nm	64.00	67.20
500 nm	63.00	66.80
520 nm	62.30	66.60
540 nm	61.60	66.30
560 nm	61.20	66.00
580 nm	60.80	65.90
600 nm	60.50	65.80
620 nm	60.30	65.70
640 nm	60.10	65.80
660 nm	60.00	66.20
680 nm	59.80	66.30
700 nm	59.60	66.40

**Calculated Relative Intensity Colors of Stibarsen in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	150%
R₁
R₂

Calculated Properties of Stibarsen

Electron Density:

r_electron=5.54 gm/cc
note: r_Stibarsen=6.48 gm/cc.

Fermion Index

Fermion Index = 0
Boson Index = 1

Photoelectric:

PE_Stibarsen= 241.81 barns/electron
U=PE_Stibarsen x r_electron=1,338.51 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stibarsen is Not Radioactive

Stibarsen Classification

Dana Class:

1.3.1.3 (1)Native Elements

(1.3)with semi-metallic and non-metallic elements

(1.3.1)Arsenic group

1.3.1.1 Arsenic As R 3m 3 2/m

1.3.1.2 Antimony Sb R 3m 3 2/m

1.3.1.3 Stibarsen SbAs R 3m 3 2/m

1.3.1.4 Bismuth Bi R 3m 3 2/m

1.3.1.5 Stistaite SnSb R 3m 3 2/m

Strunz Class:

I/B.01-20 I - Elements

I/B - Semimetals and nonmetals

I/B.01 - Arsenic-Bismuth series

I/B.01-10 Arsenic As R 3m 3 2/m

I/B.01-20 Stibarsen SbAs R 3m 3 2/m

I/B.01-30 Antimony Sb R 3m 3 2/m

I/B.01-40 Bismuth Bi R 3m 3 2/m

I/B.01-50 Arsenolamprite As Bmab 2/m 2/m 2/m

I/B.01-55 Pararsenolamprite! As Pmn2 or P 2₁nm Ortho

I/B.01-60 Paradocrasite Sb2(Sb,As)2 C 2 2

Other Stibarsen Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

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Stibarsen

SbAs
Dana No: 1.3.1.3 Strunz No: I/B.01-20
Locality:

Notes: