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Chrysocolla Mineral Data

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General Chrysocolla Information

Help on Chemical  Formula: Chemical Formula: (Cu,Al)2H2Si2O5(OH)4•n(H2O)
Help on Composition: Composition: Molecular Weight = 328.42 gm
   Aluminum   2.05 %  Al    3.88 % Al2O3
   Copper    33.86 %  Cu   42.39 % CuO
   Silicon   17.10 %  Si   36.59 % SiO2
   Hydrogen   1.92 %  H    17.14 % H2O
   Oxygen    45.06 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu1.75Al0.25H1.75(Si2O5)(OH)4•0.25(H2O)
Help on Environment: Environment: Mineral of secondary origin commonly associated with other secondary copper minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 315 BC
Help on Locality: Locality: Nizhne-Tagilsk, Ural Mountains, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek chrysos - "gold" and kolla - "glue" in allusion to the name of the material used to solder gold.
Help on Name Pronunciation: Name Pronunciation: Chrysocolla + Pronunciation Say CHRYSOCOLLA
Help on Synonym: Synonym: Bisbeeite

Chrysocolla Image

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Comments: Botryoidal chrysocolla lining a vug.
Location: Inca del Oro, Copiap├│, Chile. Scale: 7.5 x 6 cm.
© Fabre Minerals

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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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  Tenorite   Chrysocolla

Comments: Lustrous black botryoidal Tenorite mostly covering a sky-blue massive chrysocolla matrix.
Location: 79 mine, Banner district, Pinal Co., Arizona. Scale: 5.5 x 3 cm.
© Dan Weinrich

Chrysocolla Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6404:1:0.7528
Help on Cell Dimensions: Cell Dimensions: a = 5.7, b = 8.9, c = 6.7, Z = 1; V = 339.89 Den(Calc)= 1.60
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.494(1), 2.92(0.8), 8.3(0.6),

Physical Properties of Chrysocolla

Help on Cleavage: Cleavage: None
Help on Color: Color: Green, Bluish green, Blue, Blackish blue, Brown.
Help on Density: Density: 1.9 - 2.4, Average = 2.15
Help on Diaphaneity: Diaphaneity: Translucent to opaque
Help on Fracture: Fracture: Brittle - Sectile - Brittle fracture with slightly sectile shavings possible.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).
Help on Hardness: Hardness: 2.5-3.5 - Finger Nail-Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: light green

Optical Properties of Chrysocolla

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): pale blue green.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.19 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.599 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.343,KPDmeas= 0.2553,KC= 0.2145
Ncalc = 1.34 - 1.51
Help on Optical Data: Optical Data: Uniaxial (+), w=1.46, e=1.57, bire=0.1380-0.1750.

Calculated Properties of Chrysocolla

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.12 gm/cc
note: Specific Gravity of Chrysocolla =2.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0082065682
Boson Index = 0.9917934318
Help on Photoelectric: Photoelectric: PEChrysocolla = 15.21 barns/electron
U=PEChrysocolla x rElectron Density= 32.32 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chrysocolla is Not Radioactive

Chrysocolla Classification

Help on  Dana Class: Dana Class: (74)Phyllosilicate Modulated Layers
  (74.03)with joined strips
  (74.03.02)Dana Group Chrysocolla (Cu,Al)2H2Si2O5(OH)4•n(H2O) Unk Ortho
Help on  Strunz Class: Strunz Class: 09.ED.20 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.ED -Phyllosilicates with kaolinite layers
09.ED.20 Allophane Al2O3•(SiO2)1.3-2•((H2O))2.5-3 None
09.ED.20 Chrysocolla (Cu,Al)2H2Si2O5(OH)4•n(H2O) Unk Ortho
09.ED.20 Neotocite (Mn,Fe)SiO3•(H2O)(?) None
09.ED.20 Imogolite Al2SiO3(OH)4 ? Mono

Other Chrysocolla Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Ford32) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Chrysocolla :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - Franklin Minerals(Dunn)
5 - GeoScienceWorld
6 - Glendale Community College
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Scandinavian mineral gallery
17 - Tradeshop.com - The Rainbow of Gems
18 - theimage

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Dana No: Strunz No: 09.ED.20





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