Mineralogy Database

Liebauite Mineral Data

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General Liebauite Information

Help on Chemical  Formula: Chemical Formula: Ca3Cu5Si9O26
Help on Composition: Composition: Molecular Weight = 1,106.72 gm
   Calcium  10.86 %  Ca   15.20 % CaO
   Copper   28.71 %  Cu   32.32 % Cu2O
   Silicon  22.84 %  Si   48.86 % SiO2
   Oxygen   37.59 %  O
           ______        ______ 
           100.00 %       96.39 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Cu5Si9O26
Help on Environment: Environment: In cavities in argillaceous sedimentary xenoliths subjected to very high-grade thermal metamorphism.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: In Germany, at the Sattelberg and Nickenicher Sattel volcanos and the Emmelberg cone, near Kruft, Eifel district. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Friedrich Liebau, Kiel, Germany, prominent worker on silicate minerals.
Help on Name Pronunciation: Name Pronunciation: Liebauite + Pronunciation Say LIEBAUITE
Help on Synonym: Synonym: ICSD 36566
  PDF 42-1404

Liebauite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0158:1:1.9971
Help on Cell Dimensions: Cell Dimensions: a = 10.16, b = 10.001, c = 19.973, Z = 4; beta = 91.56° V = 2,028.71 Den(Calc)= 3.62
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3(1), 2.41(0.7), 6.7(0.7),

Physical Properties of Liebauite

Help on Color: Color: Blue green, Greenish blue.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Liebauite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2006,KC= 0.2092
Ncalc = 1.76
Help on Optical Data: Optical Data: Biaxial (+), a=1.722, b=1.723, g=1.734, bire=0.0120, 2V(Calc)=34, 2V(Meas)=72.8.

Calculated Properties of Liebauite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.53 gm/cc
note: Specific Gravity of Liebauite =3.62 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PELiebauite = 14.67 barns/electron
U=PELiebauite x rElectron Density= 51.71 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Liebauite is Not Radioactive

Liebauite Classification

Help on  Dana Class: Dana Class: (69)Inosilicate Chains with Side Branches or Loops
  (69.02)with P>2
  (69.02.04)Dana Group Liebauite Ca3Cu5Si9O26 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.DO.25 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DO -Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
09.DO.25 Liebauite Ca3Cu5Si9O26 C 2/c 2/m

Other Liebauite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)
Help on See Also: 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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Dana No: Strunz No: 09.DO.25