Paxite Mineral Data

Paxite Mineral Data +

General Paxite Information

Chemical Formula:

CuAs2

Composition:

Molecular Weight = 213.39 gm

Copper 29.78 % Cu

Arsenic 70.22 % As

______

100.00 %

Empirical Formula:

CuAs₂

Environment:

Hydrothermal calcite veins.

IMA Status:

Approved IMA 1961

Locality:

Cerny Dul, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named from the Latin "pax" for peace.

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Paxite Crystallography

Axial Ratios:

a:b:c =1.1424:1:1.5816

Cell Dimensions:

a = 5.839, b = 5.111, c = 8.084, Z = 4; beta = 99.7° V = 237.80 Den(Calc)= 5.96

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): 3.164(1), 3.633(0.8), 2.772(0.7),

Physical Properties of Paxite

Cleavage:

[???] Perfect

Color:

Black, Black, Steel gray.

Density:

5.3

Diaphaniety:

Opaque

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Streak:

black

Optical Properties of Paxite

RL Anisotrophism:

Very strong, in light gray-green and dark brown with violet tint.

RL Color:

Light grayish white.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Paxite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	46.40	48.20
420 nm	45.80	48.40
440 nm	45.20	48.60
460 nm	44.80	48.40
480 nm	44.60	48.00
500 nm	44.60	48.50
520 nm	44.50	49.20
540 nm	44.20	49.50
560 nm	43.80	49.40
580 nm	43.50	49.10
600 nm	43.40	48.90
620 nm	43.50	48.80
640 nm	43.70	48.60
660 nm	43.80	48.30
680 nm	43.70	47.90
700 nm	43.30	47.60

**Calculated Relative Intensity Colors of Paxite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	200%
R₁
R₂

Calculated Properties of Paxite

Electron Density:

r_electron=5.31 gm/cc
note: r_Paxite=5.96 gm/cc.

Fermion Index

Fermion Index = 0
Boson Index = 1

Photoelectric:

PE_Paxite= 64.90 barns/electron
U=PE_Paxite x r_electron= 344.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Paxite is Not Radioactive

Paxite Classification

Dana Class:

2.12.5.2 (2)Sulfides - Including Selenides and Tellurides

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

(2.12.5)Dana Group

2.12.5.1 Pararammelsbergite NiAs2 Pbma 2/m 2/m 2/m

2.12.5.2 Paxite CuAs2 P 2₁/c 2/m

Strunz Class:

II/D.07-10 II - Sulfides and sulphosalts

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

II/D.07 - Paxite series

II/D.07-10 Paxite CuAs2 P 2₁/c 2/m

II/D.07-20 Edgarite! FeNb3S6 P 6₃22 6 2 2

Other Paxite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)

See Also:

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

Paxite

CuAs2
Dana No: 2.12.5.2 Strunz No: II/D.07-10
Locality:

Notes: