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Liebauite Mineral Data
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General Liebauite Information
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 Chemical Formula: |
Ca3Cu5Si9O26 |
| Composition: |
Molecular Weight = 1,106.72 gm |
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Calcium 10.86 % Ca 15.20 % CaO |
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Copper 28.71 % Cu 32.32 % Cu2O |
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Silicon 22.84 % Si 48.86 % SiO2 |
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Oxygen 37.59 % O |
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______ ______ |
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100.00 % 96.39 % = TOTAL OXIDE |
| Empirical Formula: |
Ca3Cu5Si9O26 |
| Environment: |
In cavities in argillaceous sedimentary xenoliths subjected to very high-grade thermal metamorphism. |
| IMA Status: |
Approved IMA 1992 |
| Locality: |
In Germany, at the Sattelberg and Nickenicher Sattel volcanos and the Emmelberg cone, near Kruft, Eifel district. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Friedrich Liebau, Kiel, Germany, prominent worker on silicate minerals. |
| Name Pronunciation: |
Liebauite + Pronunciation  |
| Synonym: |
ICSD 36566 |
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IMA1990-040 |
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PDF 42-1404 |
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Liebauite Crystallography
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| Axial Ratios: |
a:b:c =1.0158:1:1.9971 |
| Cell Dimensions: |
a = 10.16, b = 10.001, c = 19.973, Z = 4; beta = 91.56° V = 2,028.71 Den(Calc)= 3.62 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c |
| X Ray Diffraction: |
By Intensity(I/Io): 3(1), 2.41(0.7), 6.7(0.7), |
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Physical Properties of Liebauite
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| Color: |
Blue green, Greenish blue. |
| Diaphaneity: |
Transparent |
| Hardness: |
5-6 - Between Apatite and Orthoclase |
| Luster: |
Vitreous (Glassy) |
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Optical Properties of Liebauite
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| Gladstone-Dale: |
CI calc= 0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2006,KC= 0.2092
Ncalc = 1.76 |
| Optical Data: |
Biaxial (+), a=1.722, b=1.723, g=1.734, bire=0.0120, 2V(Calc)=34, 2V(Meas)=72.8. |
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Calculated Properties of Liebauite
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| Electron Density: |
Bulk Density (Electron Density)=3.53 gm/cc
note: Specific Gravity of Liebauite =3.62 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PELiebauite = 14.67 barns/electron
U=PELiebauite x rElectron Density= 51.71 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Liebauite is Not Radioactive |
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Liebauite Classification
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| Dana Class: |
69.02.04.01 (69)Inosilicate Chains with Side Branches or Loops |
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(69.02)with P>2 |
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(69.02.04)Dana Group |
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69.02.04.01 Liebauite Ca3Cu5Si9O26 C 2/c 2/m |
| Strunz Class: |
09.DO.25 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DO -Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains |
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09.DO.25 Liebauite Ca3Cu5Si9O26 C 2/c 2/m |
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Other Liebauite Information
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| References: |
NAME( AntBidBlaNic2) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19) |
| See Also: |
Links to other databases for Liebauite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Liebauite Specimen Label here :
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Liebauite
Ca3Cu5Si9O26
Dana No: 69.02.04.01 Strunz No: 09.DO.25
Locality:
Notes:
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