Cadmoselite Mineral Data

Cadmoselite Mineral Data +

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General Cadmoselite Information

Chemical Formula:

CdSe

Composition:

Molecular Weight = 191.37 gm

Cadmium 58.74 % Cd

Selenium 41.26 % Se

______

100.00 %

Empirical Formula:

CdSe

Environment:

In sedimentary strata, under reducing secondary conditions of medium to high alkalinity.

IMA Status:

Valid Species (Pre-IMA) 1957

Locality:

From the Givetian sedimentary formations, locality not otherwise defined, Tuva ASSR, USSR. Link to MinDat.org Location Data.

Name Origin:

For the presence of cadmium and selenium.

Synonym:

ICSD 60630

PDF 8-459

Cadmoselite Image

Images:

Cadmoselite

Comments: Black cadmoselite grains in quartz.
Location: Republic of Tuva, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cadmoselite Crystallography

Axial Ratios:

a:c = 1:1.6317

Cell Dimensions:

a = 4.271, c = 6.969, Z = 2; V = 110.09 Den(Calc)= 5.77

Crystal System:

Hexagonal - Dihexagonal PyramidalH-M Symbol (6mm) Space Group: P 6₃mc

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

By Intensity(I/I_o): 3.72(1), 2.15(0.85), 3.29(0.75),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wyckoff R W G , Crystal Structures , 1 (1963) p.85-237, Second edition. Interscience Publishers, New York, New York, Note: wurtzite structure

Physical Properties of Cadmoselite

Cleavage:

[???] Perfect

Color:

Black.

Density:

5.663

Diaphaniety:

Translucent to Opaque

Hardness:

4 - Fluorite

Luster:

Adamantine - Resinous

Streak:

black

Optical Properties of Cadmoselite

RL Anisotrophism:

Weak.

RL Color:

Light gray in air, slightly brown in oil with brownish internal reflections.

Calculated Properties of Cadmoselite

Electron Density:

r_electron=4.94 gm/cc
note: r_Cadmoselite=5.77 gm/cc.

Fermion Index

Fermion Index = 0.17838
Boson Index = 0.82162

Photoelectric:

PE_Cadmoselite= 198.93 barns/electron
U=PE_Cadmoselite x r_electron= 983.68 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cadmoselite is Not Radioactive

Cadmoselite Classification

Dana Class:

2.8.7.3 (2)Sulfides - Including Selenides and Tellurides

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

(2.8.7)Wurtzite Group (Hexagonal: P63mc)

2.8.7.1 Wurtzite (Zn,Fe)S P 6₃mc 6mm

2.8.7.2 Greenockite CdS P 6₃mc 6mm

2.8.7.3 Cadmoselite CdSe P 6₃mc 6mm

2.8.7.4 Rambergite! MnS P 6₃mc 6mm

Strunz Class:

II/C.13-40 II - Sulfides and sulphosalts

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

II/C.13 - Wurtzite series

II/C.13-10 Wurtzite (Zn,Fe)S P 6₃mc 6mm

II/C.13-20 Matraite ZnS R 3m 3m

II/C.13-30 Greenockite CdS P 6₃mc 6mm

II/C.13-40 Cadmoselite CdSe P 6₃mc 6mm

II/C.13-50 Rambergite! MnS P 6₃mc 6mm

Other Cadmoselite Information

References:

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

See Also:

Links to other databases for Cadmoselite :
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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Cadmoselite

CdSe
Dana No: 2.8.7.3 Strunz No: II/C.13-40
Locality:

Notes: