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Liebauite

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About LiebauiteHide

Prof. Liebau
Formula:
Ca3Cu5Si9O26
Colour:
Greenish blue
Hardness:
5 - 6
Crystal System:
Monoclinic
Name:
Named in honour of Prof. Friedrich Karl Franz Liebau (31 May 1926 - 11 March 2011), a German chemist and professor for mineralogy and crystallography at the Christian-Albrechts-University of Kiel, Germany. Prof. Liebau is highly esteemed for this extensive work on the crystallography, topology and classification of silicates, on which he published a book in 1985 ('Structural Chemistry of Silicates: Structure, Bonding and Classification').
This page provides mineralogical data about Liebauite.


Classification of LiebauiteHide

Approved
9.DO.25

9 : SILICATES (Germanates)
D : Inosilicates
O : Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
69.2.4.1

69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2

Physical Properties of LiebauiteHide

Colour:
Greenish blue
Hardness:
5 - 6 on Mohs scale

Optical Data of LiebauiteHide

Type:
Biaxial (+)
RI values:
nα = 1.722 nβ = 1.723 nγ = 1.734
2V:
Measured: 72° , Calculated: 34°
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v

Chemical Properties of LiebauiteHide

Formula:
Ca3Cu5Si9O26

Crystallography of LiebauiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 10.16 Å, b = 10 Å, c = 19.97 Å
β = 91.56°
Ratio:
a:b:c = 1.016 : 1 : 1.997
Unit Cell V:
2,028.20 ų (Calculated from Unit Cell)

Type Occurrence of LiebauiteHide

Synonyms of LiebauiteHide

Other Language Names for LiebauiteHide

German:Liebauit
Spanish:Liebauita

Related Minerals - Nickel-Strunz GroupingHide

9.DO.05Pyroxferroite(Fe,Mn,Ca)SiO3Tric.
9.DO.05PyroxmangiteMnSiO3Tric. 1
9.DO.10PellyiteBa2Ca(Fe,Mg)2Si6O17Orth.
9.DO.15Nordite-(Ce)(Ce,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
9.DO.15Nordite-(La)(La,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
9.DO.15Ferronordite-(Ce)Na3SrCeFe2+Si6O17Orth.
9.DO.15Manganonordite-(Ce)Na3SrCeMn2+Si6O17Orth.
9.DO.15Ferronordite-(La)Na3Sr(La,Ce)FeSi6O17
9.DO.20AlamositePbSiO3Mon.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for LiebauiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zöller, M.H., Tillmanns, E., Hentschel, G. (1992): Liebauite, Ca3Cu5Si9O26, a new silicate mineral with 14er single chain. Zeitschrift für Kristallographie, 200, 115 - 126.
American Mineralogist (1993): 78: 673.
New Minerals (1997), New Minerals 1990-1994.
Zeitschrift für Kristallographie (1992): 200: 115-126.

Internet Links for LiebauiteHide

Localities for LiebauiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Andernach
        • Nickenich
Künzel, E., Liebauit, ein neues Mineral aus der Eifel, Lapis 9/1993
Zöller, M.H., Tillmanns, E., Hentschel, G. (1992): Liebauite, Ca3Cu5Si9O26, a new silicate mineral with 14er single chain. Zeitschrift für Kristallographie, 200, 115-126.
Mineral and/or Locality  
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