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Liebauite

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Big Photo

Nickenicher Weinberg Mt. (Nickenicher Sattelberg Mt.), Nickenich, Andernach, Eifel Mts, Rhineland-Palatinate, Germany
© Stephan Wolfsried




Formula:
Ca
 
3
Cu
 
5
Si
 
9
O
 
26
System:MonoclinicColour:Greenish blue
Hardness:5 - 6


A new IMA-approved mineral

Classification of Liebauite

IMA status:Approved
Strunz 8th edition ID:8/F.40-10
Nickel-Strunz 10th (pending) edition ID:9.DO.25

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

69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
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Type Occurrence of Liebauite

Type Locality:Nickenicher Weinberg Mt. (Nickenicher Sattelberg Mt.), Nickenich, Andernach, Eifel Mts, Rhineland-Palatinate, Germany
Year of Discovery:1992

Physical Properties of Liebauite

Colour:Greenish blue
Hardness (Mohs):5 - 6

Crystallography of Liebauite

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

Optical Data of Liebauite

Type:Biaxial (+)
RI values: nα = 1.722 nβ = 1.723 nγ = 1.734
2V:Measured: 72° , Calculated: 34°
Maximum Birefringence:δ = 0.012

Chart 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 Liebauite

Formula:
Ca
 
3
Cu
 
5
Si
 
9
O
 
26
Essential elements:Ca, Cu, O, Si
All elements listed in formula:Ca, Cu, O, Si

Relationship of Liebauite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DO.05Pyroxferroite
(Fe,Mn,Ca)SiO
 
3
9.DO.05Pyroxmangite
MnSiO
 
3
9.DO.10Pellyite
Ba
 
2
Ca(Fe,Mg)
 
2
Si
 
6
O
 
17
9.DO.15Nordite-(Ce)
(Ce,La)(Sr,Ca)Na
 
2
(Na,Mn)(Zn,Mg)Si
 
6
O
 
17
9.DO.15Nordite-(La)
(La,Ce)(Sr,Ca)Na
 
2
(Na,Mn)(Zn,Mg)Si
 
6
O
 
17
9.DO.15Ferronordite-(Ce)
Na
 
3
SrCeFe
2+
 
Si
 
6
O
 
17
9.DO.15Manganonordite-(Ce)
Na
 
3
SrCeMn
2+
 
Si
 
6
O
 
17
9.DO.15Ferronordite-(La)
Na
 
3
Sr(La,Ce)FeSi
 
6
O
 
17
9.DO.20Alamosite
Pb
 
12
[Si
 
12
O
 
36
]

Other Names for Liebauite

Synonyms:
IMA1990-040
Other Languages:
German:Liebauit
Russian:Либауит
Spanish:Liebauita

Other Information

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

References for Liebauite

Reference List:

- +
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 Liebauite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Liebauite details from Handbook of Mineralogy (PDF)
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    • Localities for Liebauite

    The 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.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Andernach
          • Eich
    		Künzel, E., Liebauit, ein neues Mineral aus der Eifel, Lapis 9/1993
          • Nickenich
    		Zöller, M.H., Tillmanns, E., Hentschel, G. (1992): Liebauite, Ca3Cu5Si9O26, a new silicate mineral with 14er single chain. Zeitschrift für Kristallographie, 200, 115-126.
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