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Friedrichbeckeite

Formula:
K(□
 
0.5
Na
 
0.5
)
 
2
Mg
 
2
Be
 
3
Si
 
12
O
 
30
System:Hexagonal
Name:In honour of the Austrian mineralogist and petrographer Friedrich Johann Karl Becke (1855–1931).


Osumilite Group.

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


Classification of Friedrichbeckeite

IMA status:Approved 2008
mindat.org URL:http://www.mindat.org/min-38698.html
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Type Occurrence of Friedrichbeckeite

Type Locality:Caspar quarry, Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.), Bellerberg volcano, Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany

Crystallography of Friedrichbeckeite

Crystal System:Hexagonal
Class (H-M):6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:P6/mcc {P6/m 2/c 2/c}
Cell Parameters:a = 9.970Å, c = 14.130Å
Ratio:a:c = 1 : 1.417
Unit Cell Volume:V 1,216.36 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
4.993 (30)
4.321 (25)
4.081 (30)
3.6898 (30)
3.5381 (25)
3.1799 (100)
2.8847 (70)

Chemical Properties of Friedrichbeckeite

Formula:
K(□
 
0.5
Na
 
0.5
)
 
2
Mg
 
2
Be
 
3
Si
 
12
O
 
30
Essential elements:Be, K, Mg, Na, O, Si
All elements listed in formula:Be, K, Mg, Na, O, Si

Relationship of Friedrichbeckeite to other Species

Member of Group:
Osumilite Group:

Other Names for Friedrichbeckeite

Synonyms:
IMA2008-019
Other Languages:
German:Friedrichbeckeit

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 Friedrichbeckeite

Reference List: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 Friedrichbeckeite

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  • Raman and XRD data at RRUFF project
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    Localities for Friedrichbeckeite

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    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.
    (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
        • Mayen
          • Ettringen
            • Bellerberg volcano
              • Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.)
    		[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]
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 20th Nov 2009 17:06:14