Malachite Mineral Data

Malachite Mineral Data
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General Malachite Information

Help on Chemical Formula: Chemical Formula: Cu2(CO3)(OH)2
Help on Composition: Composition: Molecular Weight = 221.12 gm
   Copper    57.48 %  Cu   71.95 % CuO
   Hydrogen   0.91 %  H     8.15 % H2O
   Carbon     5.43 %  C    19.90 % CO2
   Oxygen    36.18 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2(CO3)(OH)2
Help on Environment: Environment: Secondary mineral in the oxidized zones of copper ore deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) Prehistoric
Help on Locality: Locality: Nizhne-Taglisk, Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, malache, - "mallow" in reference to green leaf color.
Help on Name Pronunciation: Name Pronunciation: Malachite + Pronunciation Say MALACHITE
Help on Synonym: Synonym: ICSD 100150
  PDF 41-1390
 

Malachite Image

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Malachite   Azurite

Comments: Dark blue stubby pyramidal azurite crystals and green botryoidal-shaped radial aggregates of malachite.
Location: Nevada Lode Mine, San Juan Co., Utah, USA. Scale: 4 cm.
© Dave Barthelmy
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Malachite   Demesmaekerite

Comments: Pale green crystals of demesmaekerite on dark green malachite.
Location: Musonoi Mine, Katanga, Democratic Republic of the Congo. Scale: Crystal Size 3mm.
© John Veevaert
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Malachite   Devilline

Comments: Blue crystals of devilline on green, botryoidal malachite.
Location: Spania Dolina (Herrengrund), Slovakia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Malachite

Comments: Botryoidal malachite.
Location: Mindigi, Shaba, Congo. Scale: 7.5 x 5.5 cm.
© Fabre Minerals

Malachite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.7935:1:0.2705
Help on Cell Dimensions: Cell Dimensions: a = 9.502, b = 11.974, c = 3.24, Z = 4; beta = 98.75° V = 364.35 Den(Calc)= 4.03
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.857(1), 3.693(0.85), 5.055(0.75),
Help on Forms: Forms:

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Forms: ( 0 1 0) ( 1 0 0) ( 1 1 0) ( 2 0 1)

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Susse P , Acta Crystallographica , 22 (1967) p.146-151, Verfeinerung der kristallstruktur des malachits, Cu2(OH)2CO3

 

Physical Properties of Malachite

Help on Cleavage: Cleavage: {201} Perfect, {010} Fair
Help on Color: Color: Green, Dark green, Blackish green.
Help on Density: Density: 3.6 - 4, Average = 3.8
Help on Diaphaneity: Diaphaneity: Translucent to subtranslucent to opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: light green
 

Optical Properties of Malachite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.114 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.051 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2017,KPDmeas= 0.2139,KC= 0.192
Ncalc = 1.69 - 1.77
Help on Optical Data: Optical Data: Biaxial (-), a=1.655, b=1.875, g=1.909, bire=0.2540, 2V(Calc)=38, 2V(Meas)=43. Dispersion relatively weak.
Help on Pleochroism (x): Pleochroism (x): nearly colorless.
Help on Pleochroism (y): Pleochroism (y): yellowish green.
Help on Pleochroism (z): Pleochroism (z): deep green.
 

Calculated Properties of Malachite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.86 gm/cc
note: Specific Gravity of Malachite =4.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0007725449
Boson Index = 0.9992274551
Help on Photoelectric: Photoelectric: PEMalachite = 25.34 barns/electron
U=PEMalachite x rElectron Density= 97.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Malachite is Not Radioactive
 

Malachite Classification
Help on Dana Class: Dana Class: 16a.03.02.01 (16a)Carbonates - Hydroxyl or Halogen
  (16a.03)where (A B)2 (XO3) Zq
  (16a.03.02)Malachite Group
 
16a.03.02.01 Malachite Cu2(CO3)(OH)2 P 21/a 2/m
 
16a.03.02.02 Nullaginite Ni2(CO3)(OH)2 P 21/m,P 21 Mono
 
16a.03.02.03 Pokrovskite Mg2(CO3)(OH)2•0.5(H2O) P 21/a 2/m
 
16a.03.02.04 Chukanovite! Fe2(CO3)(OH)2 P 21/a 2/m
Help on Strunz Class: Strunz Class: 05.BA.10 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BA -With Cu, Co, Ni, Zn, Mg, Mn
 
05.BA.10 Nullaginite Ni2(CO3)(OH)2 P 21/m,P 21 Mono
 
05.BA.10 Georgeite Cu5(CO3)3(OH)4•6(H2O) None
 
05.BA.10 Malachite Cu2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 21/a 2/m
 
05.BA.10 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri
 
05.BA.10 Pokrovskite Mg2(CO3)(OH)2•0.5(H2O) P 21/a 2/m
 
05.BA.10 Rosasite (Cu,Zn)2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Chukanovite! Fe2(CO3)(OH)2 P 21/a 2/m
 

Other Malachite Information
Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68)
Help on See Also: See Also: Links to other databases for Malachite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - CalTech Mineral Spectroscopy
5 - EUROmin Project
6 - Earthprints Interactive Photo Gallary
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - Franklin Minerals(Palache)
10 - GeoScienceWorld
11 - Glendale Community College
12 - Google Images
13 - Google Scholar
14 - Handbook of Mineralogy (MinSocAm)
15 - Handbook of Mineralogy (UofA)
16 - HyperPhysics
17 - MinDAT
18 - Mineral and Gemstone Kingdom
19 - Mineralienatlas (Deutsch)
20 - NSDL Reciprocal Net (JAVA)
21 - Online Mineral Museum
22 - Philatelic Mineralogy
23 - QUT Mineral Atlas
24 - Ruff.Info
25 - Scandinavian mineral gallery
26 - Tradeshop.com - The Rainbow of Gems
27 - WWW-MINCRYST
28 - YupRocks
29 - theimage

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Ask about Malachite here :
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Rockhounds Discussion Group on Yahoo Groups
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Print or Cut-and-Paste your Malachite Specimen Label here :

Malachite

Cu2(CO3)(OH)2
Dana No: 16a.03.02.01 Strunz No: 05.BA.10
Locality:

 

Notes: