Belloite Mineral Data

General Belloite Information

Chemical Formula:

Cu(OH)Cl

Composition:

Molecular Weight = 116.01 gm

Copper 54.78 % Cu 68.57 % CuO

Hydrogen 0.87 % H 7.76 % H₂O

Chlorine 30.56 % Cl 30.56 % Cl

- % Cl -6.90 % -O=Cl₂

Oxygen 13.79 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu(OH)Cl

Environment:

Secondary mineral in an abandoned mine associated with nitratine, paracamite. Unstable in humid environments. Converts in water to botallackite and atacamite.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Sierra Gorda, Antofagasta, Chile. Link to MinDat.org Location Data.

Name Origin:

Named for Andres Bello (1780-1865), founder and first rector of the Universidad de Chile.

Synonym:

IMA1998-054

Belloite Crystallography

Axial Ratios:

a:b:c =0.8326:1:0.9184

Cell Dimensions:

a = 5.552, b = 6.668, c = 6.124, Z = 4; beta = 115° V = 205.47 Den(Calc)= 3.75

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 5.553(1)(001), 2.758(0.52)(112,121), 2.785(0.52)(120,002,201), 2.241(0.27)(122), 1.851(0.21)(213,003), 2.516(0.18)(200), 1.769(0.16)(311,122

Physical Properties of Belloite

Color:

Yellowish green, Olive green.

Diaphaneity:

Transparent to Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Vitreous (Glassy)

Streak:

yellowish green

Optical Properties of Belloite

Optical Data:

Biaxial (?), b=1.8

Calculated Properties of Belloite

Electron Density:

Bulk Density (Electron Density)=3.56 gm/cc
note: Specific Gravity of Belloite =3.75 gm/cc.

Fermion Index:

Fermion Index = 0.0000675043
Boson Index = 0.9999324957

Photoelectric:

PE_Belloite= 26.39 barns/electron
U=PE_Belloite x rElectron Density= 93.83 barns/cc.

Radioactivity:

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

Belloite Classification

Dana Class:

10.02.03.02 (10)Oxyhalides and Hydroxyhalides

(10.02)where A (O,OH) Xq

(10.02.03)Dana Group

10.02.03.01 Paralaurionite PbCl(OH) C 2/m 2/m

10.02.03.02 Belloite! Cu(OH)Cl P 2₁/a 2/m

Strunz Class:

03.DA.10b 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DA -With Cu, etc., without Pb

03.DA.10b Botallackite Cu2Cl(OH)3 P 2₁/m 2/m

03.DA.10b Clinoatacamite! Cu2(OH)3Cl P 2₁/n 2/m

03.DA.10b Belloite! Cu(OH)Cl P 2₁/a 2/m

Other Belloite Information

References:

NAME( AmMin, Vol 85) PHYS. PROP.(AmMin, Vol 85) OPTIC PROP.(AmMin, Vol 85)

See Also:

Links to other databases for Belloite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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

Belloite

Cu(OH)Cl
Dana No: 10.02.03.02 Strunz No: 03.DA.10b
Locality:

Notes:

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