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.

Name Pronunciation:

Lautite

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),

Forms:

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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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Crystal Structure:

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Bindi L , Catelani T , Chelazzi L , Paola B , Acta Crystallographica, Section E , 64 (2008) p.i22-i22, Reinvestigation of the crystal structure of lautite, CuAsS

Physical Properties of Lautite

Cleavage:

{001} Indistinct

Color:

Grayish black, Black, Steel gray.

Density:

4.9

Diaphaneity:

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:

Bulk Density (Electron Density)=4.41 gm/cc
note: Specific Gravity of Lautite =4.82 gm/cc.

Fermion Index:

Fermion Index = 0.0014102499
Boson Index = 0.9985897501

Photoelectric:

PE_Lautite= 49.18 barns/electron
U=PE_Lautite x rElectron Density= 216.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lautite is Not Radioactive

Lautite Classification

Dana Class:

02.12.08.01 (02)Sulfides - Including Selenides and Tellurides

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

(02.12.08)Dana Group

02.12.08.01 Lautite CuAsS P 2₁2₁2₁ 2 2 2

Strunz Class:

02.CB.40 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.C - Metal Sulfides, M:S = 1:1 (and similar)

02.CB -With Zn, Fe, Cu, Ag, Au, etc

02.CB.40 Lautite CuAsS P 2₁2₁2₁ 2 2 2

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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Lautite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Lautite

CuAsS
Dana No: 02.12.08.01 Strunz No: 02.CB.40
Locality:

Notes: