Lapieite Mineral Data

Lapieite Mineral Data +

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General Lapieite Information

Chemical Formula:

CuNiSbS3

Composition:

Molecular Weight = 340.18 gm

Copper 18.68 % Cu

Nickel 17.25 % Ni

Antimony 35.79 % Sb

Sulfur 28.28 % S

______

100.00 %

Empirical Formula:

CuNiSbS₃

Environment:

In a highly altered and mineralized glacial erratic.

IMA Status:

Approved IMA 1984

Locality:

Near the confluence of Glacier Creek and the Lapie River, Cyr Ranges, Yukon Territory, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA1983-002

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Lapieite Crystallography

Axial Ratios:

a:b:c =0.5933:1:0.3917

Cell Dimensions:

a = 7.422, b = 12.508, c = 4.9, Z = 4; V = 454.89 Den(Calc)= 4.97

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): 2.959(1), 1.837(0.9), 3.178(0.9),

Physical Properties of Lapieite

Cleavage:

[100] Distinct

Color:

Steel gray.

Density:

4.966

Diaphaniety:

Opaque

Hardness:

4.5-5 - Near Apatite

Luster:

Metallic

Optical Properties of Lapieite

RL Anisotrophism:

Strong, very pale blue to intense yellowish pink tints.

RL Pleochroism:

Shades of greenish gray to gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Lapieite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	33.40	32.10
420 nm	34.00	32.20
440 nm	34.60	32.50
460 nm	34.90	33.30
480 nm	34.80	34.50
500 nm	34.50	35.80
520 nm	34.10	36.50
540 nm	33.90	36.80
560 nm	34.10	36.70
580 nm	34.30	36.70
600 nm	34.30	36.80
620 nm	34.40	37.00
640 nm	34.80	37.30
660 nm	35.60	37.80
680 nm	36.60	38.60
700 nm	37.80	39.50

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

Calculated Properties of Lapieite

Electron Density:

r_electron=4.56 gm/cc
note: r_Lapieite=4.97 gm/cc.

Fermion Index

Fermion Index = 0.00407
Boson Index = 0.99593

Photoelectric:

PE_Lapieite= 132.20 barns/electron
U=PE_Lapieite x r_electron= 602.62 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lapieite is Not Radioactive

Lapieite Classification

Dana Class:

3.4.4.1 (3)Sulfides - Sulfosalts

(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.4.4)Dana Group

3.4.4.1 Lapieite CuNiSbS3 P 2₁2₁2₁ 2 2 2

3.4.4.2 Muckeite CuNiBiS3 P 2₁2₁2₁ 2 2 2

Strunz Class:

II/C.21-10 II - Sulfides and sulphosalts

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

II/C.21 - Millerite series

II/C.21-10 Lapieite CuNiSbS3 P 2₁2₁2₁ 2 2 2

II/C.21-20 Muckeite CuNiBiS3 P 2₁2₁2₁ 2 2 2

II/C.21-25 Zlatogorite! CuNiSb2 P 3m1 3 2/m

II/C.21-30 Millerite NiS R 3m 3 2/m

II/C.21-40 Makinenite NiSe R 3m 3m

Other Lapieite Information

References:

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

See Also:

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

Lapieite

CuNiSbS3
Dana No: 3.4.4.1 Strunz No: II/C.21-10
Locality:

Notes: