Chrysocolla Mineral Data + 
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- 74.3.2.1 Chrysocolla (Cu,Al)2H2Si2O5(OH)4·n(H2O) Unk Ortho
- VIII/E.21-10 Dioptase CuSiO2(OH)2 R 3 3
- VIII/E.21-20 Chrysocolla (Cu,Al)2H2Si2O5(OH)4·n(H2O) Unk Ortho
General Chrysocolla Information |
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 Chemical Formula: |
(Cu,Al)2H2Si2O5(OH)4·n(H2O) | ||
| 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 | |||
| Empirical Formula: |
Cu1.75Al0.25H1.75(Si2O5)(OH)4·0.25(H2O) | ||
| Environment: |
Mineral of secondary origin commonly associated with other secondary copper minerals. | ||
| IMA Status: |
Valid Species (Pre-IMA) 315 BC | ||
| Locality: |
Nizhne-Tagilsk, Ural Mountains, Russia Link to MinDat.org Location Data. | ||
| Name Origin: |
Named from the Greek chrysos - "gold" and kolla - "glue" in allusion to the name of the material used to solder gold. | ||
| Synonym: |
Bisbeeite | ||
Chrysocolla Image | |||
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Chrysocolla Crystallography |
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| Axial Ratios: |
a:b:c =0.6404:1:0.7528 | ||
| Cell Dimensions: |
a = 5.7, b = 8.9, c = 6.7, Z = 1; V = 339.89 Den(Calc)= 1.60 | ||
| Crystal System: |
OrthorhombicSpace Group: Unk | ||
| X Ray Diffraction: |
By Intensity(I/Io): 1.494(1), 2.92(0.8), 8.3(0.6), | ||
Physical Properties of Chrysocolla |
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| Cleavage: |
None | ||
| Color: |
Green, Bluish green, Blue, Blackish blue, Brown. | ||
| Density: |
1.9 - 2.4, Average = 2.15 | ||
| Diaphaniety: |
Translucent to opaque | ||
| Fracture: |
Brittle - Sectile - Brittle fracture with slightly sectile shavings possible. | ||
| Habit: |
Botryoidal - "Grape-like" rounded forms (e.g.. malachite). | ||
| Habit: |
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite). | ||
| Habit: |
Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite). | ||
| Hardness: |
2.5-3.5 - Finger Nail-Copper Penny | ||
| Luminescence: |
None. | ||
| Luster: |
Vitreous - Dull | ||
| Streak: |
light green | ||
Optical Properties of Chrysocolla |
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| Dichroism (e): |
colorless. | ||
| Dichroism (w): |
pale blue green. | ||
| 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 |
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| Optical Data: |
Uniaxial (+), w=1.46, e=1.57, bire=0.1380-0.1750. | ||
Calculated Properties of Chrysocolla |
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| Electron Density: |
relectron=2.12 gm/cc |
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| Fermion Index |
Fermion Index = 0.0082 Boson Index = 0.9918 |
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| Photoelectric: |
PEChrysocolla = 15.21 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chrysocolla is Not Radioactive |
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Chrysocolla Classification |
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| Dana Class: |
74.3.2.1 (74)Phyllosilicate Modulated Layers | ||
| (74.3)with joined strips | |||
| (74.3.2)Dana Group | |||
| Strunz Class: |
VIII/E.21-20 VIII - Silicates | ||
| VIII/E - Cyklosilicates, six rings [Si6O18]12- | |||
| VIII/E.21 - Dioptase - Chrysocolla series | |||
Other Chrysocolla Information |
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| References: |
NAME( Ford32) PHYS. PROP.(Ford32) OPTIC PROP.(Ford32) | ||
| See Also: |
Links to other databases for Chrysocolla : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - Crocoite.com Mineral Locations 5 - Franklin Minerals(Dunn) 6 - Glendale Community College 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (MinSocAm) 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 - Minerals of Wisconsin 16 -QUT Mineral Atlas 17 - Scandinavian mineral gallery 18 - Tradeshop.com - The Rainbow of Gems 19 -theimage Search for Chrysocolla using: Visit our Advertisers for Chrysocolla : Translate Chrysocolla Mineral Data : Ask about Chrysocolla here : Print or Cut-and-Paste your Chrysocolla Specimen Label here :
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