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 % H2 O
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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEBelloite = 26.39 barns/electronU=PEBelloite x r Electron 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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Belloite
Cu(OH)Cl
Dana No: 10.02.03.02 Strunz No: 03.DA.10b
Locality:
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