Bellidoite Mineral Data

General Bellidoite Information

Chemical Formula:

Cu2Se

Composition:

Molecular Weight = 206.05 gm

Copper 61.68 % Cu

Selenium 38.32 % Se

______

100.00 %

Empirical Formula:

Cu₂Se

Environment:

Formed at moderate to low temperature with other hydrothermal selenides and sulfides.

IMA Status:

Approved IMA 1975

Locality:

From Habri, near Tisnova, Czechoslovakia. Link to MinDat.org Location Data.

Name Origin:

For Eleodoro Bellido Bravo, Director of Servicio de Geologia y Mineria, Peru.

Name Pronunciation:

Bellidoite + Pronunciation

Synonym:

ICSD 30230

PDF 46-1129

Bellidoite Image

Images:

Bellidoite Berzelianite

Comments: Dark bellidoite inclusions in black berzelianite with white calcite.
Location: Habri, near Tisnov, Jihomoravsky, Czech Republi. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bellidoite Crystallography

Axial Ratios:

a:c = 1:1.01909

Cell Dimensions:

a = 11.52, c = 11.74, Z = 32; V = 1,558.02 Den(Calc)= 7.03

Crystal System:

Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: P 4₁/m

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

By Intensity(I/I_o): 2.06(1), 3.38(0.8), 1.763(0.7),

Physical Properties of Bellidoite

Color:

Silver gray.

Density:

7.03

Diaphaneity:

Opaque

Hardness:

1.5-2 - Talc-Gypsum

Luster:

Metallic

Optical Properties of Bellidoite

RL Anisotrophism:

Very weak in gray colors.

RL Color:

Creamy white.

RL Pleochroism:

Very weak.

Calculated Properties of Bellidoite

Electron Density:

Bulk Density (Electron Density)=6.28 gm/cc
note: Specific Gravity of Bellidoite =7.03 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Bellidoite= 59.11 barns/electron
U=PE_Bellidoite x rElectron Density= 371.10 barns/cc.

Radioactivity:

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

Bellidoite Classification

Dana Class:

02.04.09.01 (02)Sulfides - Including Selenides and Tellurides

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

(02.04.09)Dana Group

02.04.09.01 Bellidoite Cu2Se P 4₁/m 4/m

Strunz Class:

02.BA.15b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)

02.BA -With Cu, Ag, Au

02.BA.15b Bellidoite Cu2Se P 4₁/m 4/m

Other Bellidoite Information

References:

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

See Also:

Links to other databases for Bellidoite :
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

Search for Bellidoite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Bellidoite :

Ask about Bellidoite 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 Bellidoite Specimen Label here :

Bellidoite

Cu2Se
Dana No: 02.04.09.01 Strunz No: 02.BA.15b
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.