Malachite Mineral Data (original) (raw)

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

Click Here for Larger Malachite Image in a New Browser Window Images:

Click Here for Larger Malachite Image 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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Click Here for Larger Malachite Image 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 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) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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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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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: