Lautite Mineral Data

Lautite Mineral Data +

General Lautite Information

Chemical Formula:

CuAsS

Composition:

Molecular Weight = 170.53 gm

Copper 37.26 % Cu

Arsenic 43.93 % As

Sulfur 18.80 % S

______

100.00 %

Empirical Formula:

CuAsS

Environment:

In hydrothermal veins formed at a moderate temperature.

IMA Status:

Valid Species (Pre-IMA) 1881

Locality:

Vater Abraham Mine (Shaft 139), Lauta, Marienberg District, Erzgebirge, Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Synonym:

ICSD 34450

PDF 39-393

Lautite Image

Images:

Lautite

Comments: Metallic dark gray Lautite aggregate.
Location: Rudolph Shaft, Lauta, Marienberg District, Erzgebirge, Saxony, Germany. Scale: Specimen size 3 cm.
© Thomas Witzke / Abraxas-Verlag

Lautite Crystallography

Axial Ratios:

a:b:c =0.6979:1:2.1031

Cell Dimensions:

a = 3.79, b = 5.43, c = 11.42, Z = 4; V = 235.02 Den(Calc)= 4.82

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

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

By Intensity(I/I_o): 3.1(1), 1.903(0.8), 1.61(0.6),

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Forms: [ 1 2 4] [ 0 3 4] [ 2 3 4] [ 1 0 2] [ 2 3 0] [ 0 0 1]

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Physical Properties of Lautite

Cleavage:

[001] Indistinct

Color:

Grayish black, Black, Steel gray.

Density:

4.9

Diaphaniety:

Opaque

Fracture:

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

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Metallic

Streak:

black

Optical Properties of Lautite

RL Anisotrophism:

Weak.

RL Pleochroism:

Very weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Lautite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	36.00	37.60
420 nm	34.70	36.40
440 nm	33.40	35.20
460 nm	32.30	34.00
480 nm	31.40	33.10
500 nm	30.70	32.30
520 nm	30.50	31.70
540 nm	30.20	31.40
560 nm	30.10	31.20
580 nm	30.20	31.10
600 nm	30.30	31.20
620 nm	30.50	31.30
640 nm	30.80	31.50
660 nm	31.10	31.80
680 nm	31.50	32.00
700 nm	31.90	32.30

**Calculated Relative Intensity Colors of Lautite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%	290%
R₁
R₂

Calculated Properties of Lautite

Electron Density:

r_electron=4.41 gm/cc
note: r_Lautite=4.82 gm/cc.

Fermion Index

Fermion Index = 0.00141
Boson Index = 0.99859

Photoelectric:

PE_Lautite= 49.18 barns/electron
U=PE_Lautite x r_electron= 216.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lautite is Not Radioactive

Lautite Classification

Dana Class:

2.12.8.1 (2)Sulfides - Including Selenides and Tellurides

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

(2.12.8)Dana Group

2.12.8.1 Lautite CuAsS P 2₁2₁2₁ 2 2 2

Strunz Class:

II/C.02-10 II - Sulfides and sulphosalts

II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1

II/C.02 - Sphalerite group and related compounds (with Leutite)

II/C.02-10 Lautite CuAsS P 2₁2₁2₁ 2 2 2

II/C.02-60 Dukeite! Bi24Cr8O57(OH)6(H2O)3 P 3₁c 3m

Other Lautite Information

References:

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

See Also:

Links to other databases for Lautite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Lautite Specimen Label here :

Lautite

CuAsS
Dana No: 2.12.8.1 Strunz No: II/C.02-10
Locality:

Notes: