Emplectite Mineral Data

Emplectite Mineral Data +

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General Emplectite Information

Chemical Formula:

CuBiS2

Composition:

Molecular Weight = 336.66 gm

Copper 18.88 % Cu

Bismuth 62.07 % Bi

Sulfur 19.05 % S

______

100.00 %

Empirical Formula:

CuBiS₂

Environment:

In hydrothermal veins with other sulfides and sulfosalts formed at moderate temperatures.

IMA Status:

Valid Species (Pre-IMA) 1853

Locality:

Czechoslovakia at Schlaggenwald, Bohemia. Link to MinDat.org Location Data.

Name Origin:

From the Greek emplektos, "interwoven."

Synonym:

ICSD 34936

Klaprothite - mixture with wittichenite

PDF 43-1473

Emplectite Image

Images:

Emplectite

Comments: Metallic emplectite wire in quartz.
Location: Schwarzenberg, Saxony, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Emplectite Crystallography

Axial Ratios:

a:b:c =0.4228:1:0.2698

Cell Dimensions:

a = 6.1413, b = 14.524, c = 3.9191, Z = 4; V = 349.57 Den(Calc)= 6.40

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnam

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

By Intensity(I/I_o): 3.05(1), 3.23(0.9), 3.13(0.7),

Forms:

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Forms: [ 0 1 1] [ 0 1 0] [ 0 1 3] [ 1 0 0] [ 1 1 0]

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Crystal Structure:

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Kyono A , Kimata M , American Mineralogist , 90 (2005) p.162-165, Crystal structures of chalcostibite (CuSbS2) and emplectite (CuBiS2): Structural, relationship of stereochemical activity between chalcostibite and emplectite

View Additional jPOWD Structure files for Emplectite
[1]

Physical Properties of Emplectite

Cleavage:

[001] Perfect

Color:

Gray, Grayish yellow, Silver white, Tin white.

Density:

6.3 - 6.5, Average = 6.4

Diaphaniety:

Opaque

Fracture:

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

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

black

Optical Properties of Emplectite

RL Color:

Light yellow.

RL Pleochroism:

Very low.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Emplectite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	28.70	31.10
420 nm	30.00	32.20
440 nm	31.30	33.30
460 nm	32.40	34.40
480 nm	33.40	35.40
500 nm	34.40	36.20
520 nm	35.20	37.00
540 nm	35.90	37.50
560 nm	36.50	38.00
580 nm	37.00	38.30
600 nm	37.50	38.60
620 nm	37.90	38.80
640 nm	38.10	38.80
660 nm	38.20	38.70
680 nm	38.20	38.50
700 nm	38.00	38.00

**Calculated Relative Intensity Colors of Emplectite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%	280%
R₁
R₂

Calculated Properties of Emplectite

Electron Density:

r_electron=5.47 gm/cc
note: r_Emplectite=6.40 gm/cc.

Fermion Index

Fermion Index = 0.00142
Boson Index = 0.99858

Photoelectric:

PE_Emplectite=1,178.18 barns/electron
U=PE_Emplectite x r_electron=6,450.50 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Emplectite is Not Radioactive

Emplectite Classification

Dana Class:

3.7.5.2 (3)Sulfides - Sulfosalts

(3.7)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.7.5)Dana Group

3.7.5.1 Chalcostibite CuSbS2 Pnam 2/m 2/m 2/m

3.7.5.2 Emplectite CuBiS2 Pnam 2/m 2/m 2/m

Strunz Class:

II/E.04-20 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x), Sulfosalts with predominant Iron and Copper x = 2.0

II/E.04 - Chalcostibite - Hodrushite series

II/E.04-10 Chalcostibite CuSbS2 Pnam 2/m 2/m 2/m

II/E.04-20 Emplectite CuBiS2 Pnam 2/m 2/m 2/m

II/E.04-25 Kupcikite! Cu3.4Fe0.6Bi5S10 C 2/m 2/m

II/E.04-30 Cuprobismutite Cu10Bi12S23 C 2/m 2/m

II/E.04-40 Hodrushite Cu8Bi12S22 A2/m 2/m

Other Emplectite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

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Emplectite

CuBiS2
Dana No: 3.7.5.2 Strunz No: II/E.04-20
Locality:

Notes: