Cuprite Mineral Data

Cuprite Mineral Data
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General Cuprite Information

Help on Chemical Formula: Chemical Formula: Cu2O
Help on Composition: Composition: Molecular Weight = 143.09 gm
   Copper  88.82 %  Cu  100.00 % Cu2O
   Oxygen  11.18 %  O
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2O
Help on Environment: Environment: Oxidized zone of copper deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1845
Help on Locality: Locality: Commonly in the copper deposits of SW USA and in Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Latin, cuprum, meaning copper. Chalcotrichite from the Greek, meaning "hairy copper."
Help on Name Pronunciation: Name Pronunciation: Cuprite Say CUPRITE
Help on Synonym: Synonym: Chalcotrichite
  ICSD 63281
  PDF 5-667
  Red oxide of copper
 

Cuprite Image

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Cuprite

Comments: Dark red ball or sphere of cuprite crystals set on a pearly white dolomite crystal matrix.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: 5 x 2.5 x 4 cm.
© Dan Weinrich
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Cuprite   Chrysocolla

Comments: Semi-metallic, dark reddish gray, cuprite crystals on blue chrysocolla.
Location: Mashamba West mine, Shaba, Congo. Scale: 7.5 x 4.7 x 2.3 cm.
© Fabre Minerals
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Cuprite

Comments: Red, acicular chalcotrichite crystals as a fine, fibrous red mass on matrix.
Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Cuprite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 4.2696, Z = 2; V = 77.83 Den(Calc)= 6.11
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P n3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.465(1), 2.135(0.37), 1.51(0.27),
Click Here for Large Cuprite Structure Window Crystal Structure:

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Hafner S S , Nagel S , Physics and Chemistry of Minerals , 9 (1983) p.19-22, The electric field gradient at the position of copper in, Cu2O and electronic charge density analysis by means of K-factors

View Additional jPOWD Structure files for Cuprite
[1]
 

Physical Properties of Cuprite

Help on Cleavage: Cleavage: {111} Imperfect
Help on Color: Color: Brown red, Purple red, Red, Black.
Help on Density: Density: 6.1
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Capillary - Very slender and long, like a thread or hair (e.g. millerite).
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: brownish red
 

Optical Properties of Cuprite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.296 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.294 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3028,KPDmeas= 0.3033,KC= 0.234
Ncalc = 2.43
Help on Optical Data: Optical Data: Isotropic, n=2.85.
Help on RL Color: RL Color: Gray blue with internal red reflections.
Help on RL Pleochroism: RL Pleochroism: Anomalous.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Cuprite in Air
λ R  ∑ R(λ) 
 400 nm   32.10   
 420 nm   32.20 
 440 nm   32.30 
 460 nm   31.70 
 480 nm   30.40 
 500 nm   28.80 
 520 nm   27.50 
 540 nm   26.30 
 560 nm   25.50 
 580 nm   24.80 
 600 nm   24.40 
 620 nm   23.90 
 640 nm   23.60 
 660 nm   23.40 
 680 nm   23.20 
 700 nm   23.10 
Calculated Relative Intensity Colors of Cuprite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360%
R                      
 

Calculated Properties of Cuprite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.64 gm/cc
note: Specific Gravity of Cuprite =6.11 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.00005367
Boson Index = 0.99994633
Help on Photoelectric: Photoelectric: PECuprite = 40.46 barns/electron
U=PECuprite x rElectron Density= 228.05 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cuprite is Not Radioactive
 

Cuprite Classification
Help on Dana Class: Dana Class: 04.01.01.01 (04)Simple Oxides
  (04.01)with a cation charge of 1+ (A+2 O)
  (04.01.01)Dana Group
 
04.01.01.01 Cuprite Cu2O P n3m 4/m 3 2/m
Help on Strunz Class: Strunz Class: 04.AA.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.A - Metal:Oxygen = 2.1 and 1:1
  04.AA -Cation:Anion (M:O) = 2:1 (and 1.8:1)
 
04.AA.10 Cuprite Cu2O P n3m 4/m 3 2/m
 

Other Cuprite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Cuprite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - Franklin Minerals(Palache)
8 - Glendale Community College
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - HyperPhysics
14 - MinDAT
15 - MinMax(Deutsch)
16 - MinMax(English)
17 - Mineralienatlas (Deutsch)
18 - Philatelic Mineralogy
19 - QUT Mineral Atlas
20 - Ruff.Info
21 - Tradeshop.com - The Rainbow of Gems
22 - University of Colorado - Mineral Structure Data
23 - WWW-MINCRYST
24 - YupRocks
25 - theimage

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

Cuprite

Cu2O
Dana No: 04.01.01.01 Strunz No: 04.AA.10
Locality:

 

Notes: