Klöchite
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About Klöchite
Formula:
(□Na)KFe2+2Zn3(Si12O30)
Colour:
Blue
Lustre:
Vitreous
Specific Gravity:
3.007 (Calculated)
Crystal System:
Hexagonal
Member of:
Name:
Named after the type locality, Klöch in Styria.
Type Locality:
Classification of Klöchite
Approved
Approval Year:
2007
Physical Properties of Klöchite
Optical Data of Klöchite
Type:
Uniaxial (-)
RI values:
nω = 1.594() nε = 1.950(1)
Max Birefringence:
δ = 0.356

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Strong
Comments:
Omega: dark blue; epsilon: pale yellow.
Chemical Properties of Klöchite
Formula:
(□Na)KFe2+2Zn3(Si12O30)
IMA Formula:
(Fe2+Fe3+)◻2KZn3(Si12O30)
Crystallography of Klöchite
Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mmc
Cell Parameters:
a = 10.120 Å, c = 14.298 Å
Ratio:
a:c = 1 : 1.413
Unit Cell V:
1,268.14 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
7.149 | (100) |
5.540 | (43) |
4.130 | (40) |
3.736 | (70) |
3.227 | (67) |
2.920 | (40) |
2.770 | (68) |
2.530 | (43) |
Type Occurrence of Klöchite
General Appearance of Type Material:
Small blue hexagonal plates.
Geological Setting of Type Material:
In xenolith
Associated Minerals at Type Locality:
Synonyms of Klöchite
Other Language Names for Klöchite
Relationship of Klöchite to other Species
Member of:
Other Members of this group:
Agakhanovite-(Y) | (YCa)□2KBe3Si12O30 | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Almarudite | K(□,Na)2(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm |
Armenite | BaCa2Al6Si9O30 · 2H2O | Orth. mmm (2/m 2/m 2/m) : Pnna |
Berezanskite | K□2Li3(Ti,Zr,Sn)2[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Brannockite | (K,Na)□2Li3(Sn,Zr,Ti)2[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Darapiosite | K(Na,◻,K)2(Li,Zn,Fe)3(Mn,Zr,Y)2[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Dusmatovite | K(Na,□)2(Zn,Li)3(Mn2+,Y,Zr)2[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Eifelite | KNa3Mg4Si12O30 | Hex. |
Friedrichbeckeite | K(□0.5Na0.5)2Mg2Be3Si12O30 | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Merrihueite | (K,Na)2(Fe,Mg)5Si12O30 | Hex. |
Milarite | K2Ca4Al2Be4Si24O60 · H2O | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Oftedalite | K(Sc,Ca,Mn2+)2◻2[(Be,Al)3Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Osumilite | (K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30 | Hex. |
Osumilite-(Mg) | KMg2Al3(Al2Si10)O30 | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Poudretteite | KNa2B3Si12O30 | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Roedderite | (Na,K)2(Mg,Fe)5Si12O30 | Hex. 6 m2 : P62c |
Shibkovite | K(□,K,Na)2Zn3Ca2[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Sogdianite | K(□,Na)2Li3(Zr,Fe,Ti)2[Si12O30] | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
Sugilite | K(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30] | Hex. |
Trattnerite | □(Fe3+,Mg,Fe2+)2(Mg,Fe2+,Fe3+)3(Si12O30) | Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc |
UM1990-73-SiO:KMnNaZn | (K,Na)2Zn3Mn1.5Si12O30 | Hex. |
Unnamed (Al-dominant analog of Sugilite) | K(Na,□)2Li3(Al,Mn,Fe)2[Si12O30] | |
Yagiite | (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 | Hex. 6/mmm (6/m 2/m 2/m) |
Other Information
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 Klöchite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
IMA website - Proposals approved in February 2008
Walter, F. (2009): Der Steirische Mineralog, Jg. 18, H. 23, 8-13.
Bojar, H. P., Walter, F., Hauzenberger, C., & Postl, W. (2011). Klöchite, K□ 2 (Fe2+ Fe3+) Zn3 [Si12O30], A New Milarite-Type Mineral Species From The Klöch Volcano, Styria, Austria. The Canadian Mineralogist, 49(4), 1115-1124.
Internet Links for Klöchite
mindat.org URL:
https://www.mindat.org/min-35832.html
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External Links:
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Localities for Klöchite
Locality List




All localities listed without proper references should be considered as questionable.
Austria (TL) | |
| IMA website - Proposals approved in February 2008 |
Basalt quarry, Klöch, Bad Radkersburg, Styria, Austria