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Friedrichbeckeite

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Big Photo

Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany
© R.Kristiansen




Formula:
K(□
 
0.5
Na
 
0.5
)
 
2
Mg
 
2
Be
 
3
Si
 
12
O
 
30
System:Hexagonal
Member of:Osumilite Group
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
Please feel free to link to this page.

Type Occurrence of Friedrichbeckeite

Type Locality:Caspar quarry, 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)
2.7374 (25)

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:Osumilite Group
Other Members of Group:

- +
Almarudite
K(□,Na)
 
2
(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(Be,Al)
 
3
[Si
 
12
O
 
30
]
Armenite
BaCa
 
2
Al
 
6
Si
 
9
O
 
30
 · 2H
 
2
O
Berezanskite
K□
 
2
Li
 
3
(Ti,Zr,Sn)
 
2
[Si
 
12
O
 
30
]
Brannockite
(K,Na)□
 
2
Li
 
3
(Sn,Zr,Ti)
 
2
[Si
 
12
O
 
30
]
Darapiosite
KNa
 
2
(Zn,Li)
 
3
(Mn,Zr)
 
2
[Si
 
12
O
 
30
]
Dusmatovite
K(Na,□)
 
2
(Zn,Li)
 
3
(Mn
2+
 
,Y,Zr)
 
2
[Si
 
12
O
 
30
]
Klöchite
(□Na)KFe
 
3
Zn
 
3
[Si
 
12
O
 
30
]
Merrihueite
(K,Na)
 
2
(Fe,Mg)
 
5
Si
 
12
O
 
30
Milarite
K
 
2
Ca
 
4
Al
 
2
Be
 
4
Si
 
24
O
 
60
 · H
 
2
O
Osumilite
(K,Na)(Fe
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
3
(Si,Al)
 
12
O
 
30
Osumilite-(Mg)
(K,Na)(Mg,Fe)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
 · H
 
2
O
Roedderite
(Na,K)
 
2
(Mg,Fe)
 
5
Si
 
12
O
 
30
Shibkovite
K(□,K,Na)
 
2
Zn
 
3
Ca
 
2
[Si
 
12
O
 
30
]
Sogdianite
K(□,Na)
 
2
Li
 
3
(Zr,Fe,Ti)
 
2
[Si
 
12
O
 
30
]
Sugilite
K(Na,□)
 
2
Li
 
3
(Fe,Mn,Al,Zr)
 
2
[Si
 
12
O
 
30
]
Trattnerite
(□,K)(Mg, Fe
2+
 
)
 
3
Fe
3+
2
[Si
 
12
O
 
30
]
Yagiite
(Na,K)
 
3
Mg
 
4
(Al,Mg)
 
6
(Si,Al)
 
24
O
 
60

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
  • American Mineralogist Crystal Structure Database
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    • Localities for Friedrichbeckeite

    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
        • Mayen
          • Ettringen
            • Bellerberg volcano
    		[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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