Pararsenolamprite Mineral Data

Pararsenolamprite Mineral Data

General Pararsenolamprite Information

Chemical Formula:

Composition:

Molecular Weight = 76.51 gm

Antimony 7.96 % Sb

Arsenic 92.04 % As

______

100.00 %

Empirical Formula:

As_0.94Sb_0.05

Environment:

Overgrowths on colloform arsenic found in dump material in a Sb-As-Ag-Au deposit. Trimorphous with arsenic and arsenolamprite..

IMA Status:

Approved IMA 1999 (Dana # Added)

Locality:

Mukuno mone, Yamaga-cho, Oita Prefecture, Kyushy, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the dimorphous relationship with arsenolamprite.

Synonym:

IMA1999-047

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Pararsenolamprite Crystallography

Axial Ratios:

a:b:c =0.3298:1:1.0115

Cell Dimensions:

a = 3.3633, b = 10.196, c = 10.314, Z = 18; V = 353.69 Den(Calc)= 6.47

Crystal System:

OrthorhombicSpace Group: Pmn2 or P 2₁nm

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

By Intensity(I/I_o): 5.17(1)(002), 3.259(0.58)(013), 2.84(0.27)(032),1.794(0.26), 4.6(0.24)(012), 2.299(0.23)(024), 2.58(0.22)(004),

Physical Properties of Pararsenolamprite

Color:

Lead gray.

Density:

5.88 - 6.01, Average = 5.94

Diaphaniety:

Opaque

Fracture:

Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Metallic

Streak:

black

Optical Properties of Pararsenolamprite

RL Anisotrophism:

Strong.

RL Bireflectance:

From creamy to brown, gray, green.

RL Color:

White with a slight greenish blue tint.

RL Pleochroism:

Dark brown and greenish gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Pararsenolamprite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	49.00	44.00
546 nm	47.00	42.10
589 nm	44.80	39.90
650 nm	44.90	40.30

**Standardized Intensity (100%) Reflection Spectra of Pararsenolamprite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	33.60	29.30
546 nm	31.50	28.00
589 nm	29.70	26.90
650 nm	29.20	26.00

**Calculated Relative Intensity Colors of Pararsenolamprite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	220%
R₁
R₂

**Calculated Relative Intensity Colors of Pararsenolamprite in Oil**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	330%
R₁
R₂

Calculated Properties of Pararsenolamprite

Electron Density:

r_electron=5.68 gm/cc
note: r_{Pararsenolamprite}=6.47 gm/cc.

Fermion Index

Fermion Index = 0
Boson Index = 1

Photoelectric:

PE_{Pararsenolamprite}= 94.31 barns/electron
U=PE_{Pararsenolamprite} x r_electron= 535.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Pararsenolamprite is Not Radioactive

Pararsenolamprite Classification

Dana Class:

1.3.2.2 (1)Native Elements

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

(1.3.2)Dana Group

1.3.2.1 Arsenolamprite As Bmab 2/m 2/m 2/m

1.3.2.2 Pararsenolamprite ! As Pmn2 or P 2₁nm Ortho

Strunz Class:

I/B.01-55 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 Pararsenolamprite Information

References:

NAME( AmMin, vol 87, p 998) PHYS. PROP.(AmMin, vol 87, p 998) OPTIC PROP.(AmMin, vol 87, p 998)

See Also:

Links to other databases for Pararsenolamprite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Pararsenolamprite

As
Dana No: 1.3.2.2 Strunz No: I/B.01-55
Locality:

Notes: