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About FriedrichbeckeiteHide

Friedrich Becke
Crystal System:
Member of:
Named in 2009 by C. L. Lengauer, N. Hrauda, Uwe Kolitsch, R. Krickl, and E. Tillmanns, in honour of Friedrich Johann Karl Becke [December 31, 1855 Praha, Bohemia (Prague, Czech Republic) – June 18, 1931 Wien, Austria]. Becke was professor of mineralogy at the University of Czernowitz (Cernauti, Romania), at the German University (Praha), and the University of Wien. Becke was both a crystallographer and petrologist and in the latter field greatly influenced optical mineralogical theory from many important innovations. The Becke Line determination method of refractive index is named for him. Becke was also an important author and editor.
Osumilite Group.

Can be distinguished from its Mn analogue almarudite and from yellowish roedderite only by quantitative chemical analysis.

Classification of FriedrichbeckeiteHide

Approval Year:

Chemical Properties of FriedrichbeckeiteHide


Crystallography of FriedrichbeckeiteHide

Crystal System:
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
Cell Parameters:
a = 9.970 Å, c = 14.130 Å
a:c = 1 : 1.417
Unit Cell V:
1,216.36 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
4.993 Å(30)
4.321 Å(25)
4.081 Å(30)
3.6898 Å(30)
3.5381 Å(25)
3.1799 Å(100)
2.8847 Å(70)
2.7374 Å(25)

Type Occurrence of FriedrichbeckeiteHide

Synonyms of FriedrichbeckeiteHide

Other Language Names for FriedrichbeckeiteHide

Relationship of Friedrichbeckeite to other SpeciesHide

Member of:
Other Members of this group:
Agakhanovite-(Y)(YCa)□2KBe3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
AlmaruditeK(◻,Na)2(Mn,Fe,Mg)2[(Be,Al)3Si12]O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
AluminosugiliteKNa2Al2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
BerezanskiteKTi2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
BrannockiteKSn2(Li3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ChayesiteK(Mg,Fe2+)4Fe3+[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DarapiositeKNa2Mn2(Li2ZnSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DusmatoviteKK2Mn2(Zn2LiSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Klöchite(Fe2+Fe3+)◻2KZn3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
OftedaliteKSc22Be3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Osumilite-(Mg)KMg2Al3(Al2Si10)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
RoedderiteKNaMg2(Mg3Si12)O30Hex. 6 m2 : P62c
ShibkoviteK2Ca2(Zn3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SogdianiteKZr2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
TrattneriteFe3+2(Mg3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Unnamed (Mn3+-dominant analog of Sugilite)KNa2(Mn3+,Fe3+,Al)2Li3Si12O30
YagiiteNaMg2(AlMg2Si12)O30Hex. 6/mmm (6/m 2/m 2/m)

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 FriedrichbeckeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lengauer, C.L., Hrauda, N., Kolitsch, U., Krickl, R., Tillmanns, E. (2009): Friedrichbeckeite, K(□0.5Na0.5)2(Mg0.8Mn0.1Fe0.1)2(Be0.6Mg0.4)3[Si12O30], a new milarite-type mineral from the Bellerberg volcano, Eifel area, Germany. Mineralogy and Petrology, 96, 221-232.
Jahn, S. (2009): Friedrichbeckeit - Ein neues Mineral vom Bellerberg. Mineralien-Welt 20 (5), 7. [Brief portrait in German]

Internet Links for FriedrichbeckeiteHide

Localities for FriedrichbeckeiteHide

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 (TL)
  • Rhineland-Palatinate
    • Mayen-Koblenz District
      • Vordereifel
        • Ettringen
[IMA website - Proposals approved in August 2008] [ Lengauer, C.L., Hrauda, N., Kolitsch, U., Krickl, R., Tillmanns, E. (2009): Friedrichbeckeite, K(□0.5Na0.5)2(Mg0.8Mn0.1Fe0.1)2(Be0.6 Mg0.4)3[Si12O30], a new milarite-type mineral from the Bellerberg volcano, Eifel area, Germany. Mineralogy and Petrology, 79]
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