Mineralogy Database

Friedrichbeckeite Mineral Data

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General Friedrichbeckeite Information

Help on Chemical  Formula: Chemical Formula: K([ ],Na)Mg2(Be2Mg)Si12O30
Help on Composition: Composition: Molecular Weight = 982.67 gm
   Potassium   3.46 %  K     4.17 % K2O
   Sodium      2.01 %  Na    2.71 % Na2O
   Magnesium   6.78 %  Mg   11.24 % MgO
   Manganese   1.57 %  Mn    2.02 % MnO
   Beryllium   1.68 %  Be    4.66 % BeO
   Iron        1.36 %  Fe    1.75 % FeO
   Silicon    34.30 %  Si   73.37 % SiO2
   Oxygen     48.84 %  O
             ______        ______ 
             100.00 %       99.93 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.87Na0.86Mg1.57Mn2+0.28Fe2+0.24Be1.83Mg1.17Si12O30
Help on Environment: Environment: Found in a single silicate-rich xenolith in volcanic rocks. Milarite group. Mg-dominant analogue of almarudite, milarite or oftedalite.
Help on IMA Status: IMA Status: Approved IMA 2008 (Dana # Added)
Help on Locality: Locality: Bellerberg, Ettringen, Eifel, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Friedrich Johann Karl Becke (1855-1931), Austrian mineralogist and petrographer.
Help on Name Pronunciation: Name Pronunciation: Friedrichbeckeite + Pronunciation Say FRIEDRICHBECKEITE
Help on Synonym: Synonym: IMA2008-019

Friedrichbeckeite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.41725
Help on Cell Dimensions: Cell Dimensions: a = 9.97, c = 14.13, Z = 2; V = 1,216.36 Den(Calc)= 2.68
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.1799(1), 2.8847(0.7), 3.6898(0.3),4.081(0.3), 4.993(0.3), 2.7374(0.25), 3.5381(0.25), 4.321(0.25),

Physical Properties of Friedrichbeckeite

Help on Cleavage: Cleavage: None
Help on Color: Color: Light yellow.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Irregular - Very brittle fracture producing irregular fragments
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Friedrichbeckeite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2076,KC= 0.2069
Ncalc = 1.55
Help on Optical Data: Optical Data: Uniaxial (+), w=1.552, e=1.561, bire=0.0090.

Calculated Properties of Friedrichbeckeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.66 gm/cc
note: Specific Gravity of Friedrichbeckeite =2.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEFriedrichbeckeite = 2.65 barns/electron
U=PEFriedrichbeckeite x relectron= 7.05 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 49.56 (Gamma Ray American Petroleum Institute Units)
Concentration of Friedrichbeckeite per GRapi unit = 2.02 (%)

Estimated Radioactivity from Friedrichbeckeite - barely detectable


Friedrichbeckeite Classification

Help on  Dana Class: Dana Class: 63.02.01a.21 (63)Cyclosilicate Condensed Rings
  (63.02)6-membered rings
  (63.02.01a)Milarite - Osumilite group (Milarite - Osumilite subgroup)
63.02.01a.01 Brannockite KSn2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.02 Chayesite K(Mg,Fe)4Fe(Si12O30) P 6/mcc 6/m 2/m 2/m
63.02.01a.03 Darapiosite KNa2Zr[Li(Mn,Zr)2Si12O30] P 6/mcc 6/m 2/m 2/m
63.02.01a.04 Eifelite KNa3Mg4Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.05 Merrihueite (K,Na)2(Fe,Mg)5Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.06 Osumilite-(Fe) (K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.07 Osumilite-(Mg) (K,Na)(Mg,Fe)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.08 Poudretteite KNa2B3Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.09 Sugilite KNa2(Fe,Mn,Al)2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.10 Yagiite (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 P 6/mmc 6/m 2/m 2/m
63.02.01a.11 Dusmatovite K(K,Na,[])(Mn,Y,Zr)2(Zn,Li)3Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.12 Milarite K2Ca4Al2Be4Si24O60•(H2O) P 6/mcc 6/m 2/m 2/m
63.02.01a.13 Sogdianite (K,Na)2(Li,Fe,Al)3ZrSi12O30 P 6/mmm 6/m 2/m 2/m
63.02.01a.14 Roedderite (Na,K)2(Mg,Fe)5Si12O30 P 63/mmc 6/m 2/m 2/m
63.02.01a.15 Berezanskite! KLi3Ti2Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.16 Shibkovite! K(Ca,Mn,Na)2(K2-x,[]x)2ZnSi12O30(x~0.8) P 6/mcc 6/m 2/m 2/m
63.02.01a.17 Trattnerite! (Fe,Mg)2(Mg,Fe)3(Si12O30) P 6/mcc 6/m 2/m 2/m
63.02.01a.18 Almarudite! K([],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30] P 6/mcc 6/m 2/m 2/m
63.02.01a.19 Oftedalite! (Sc,Ca)2KBe3Si12O30 P 6/mmc 6/m 2/m 2/m
63.02.01a.20 Klochite ([]1Na1)KFe2Zn3[Si12O30] P 6/mcc 6/m 2/m 2/m
63.02.01a.21 Friedrichbeckeite! K([],Na)Mg2(Be2Mg)Si12O30 P 6/mcc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.CX.00 09 - SILICATES (Germanates)
  09.C - Unclassified Strunz Cyklosilicates
  09.CX -Unknown
09.CX.00 Klochite ([]1Na1)KFe2Zn3[Si12O30] P 6/mcc 6/m 2/m 2/m
09.CX.00 Friedrichbeckeite! K([],Na)Mg2(Be2Mg)Si12O30 P 6/mcc 6/m 2/m 2/m
09.CX.00 IMA2009-004 KCa7Sn2Li3Si12O36F2 C 2/m 2/m

Other Friedrichbeckeite Information

Help on References: References: NAME( Mineralogy and Petrology) PHYS. PROP.(Mineralogy and Petrology) OPTIC PROP.(Mineralogy and Petrology)
Help on See Also: See Also: Links to other databases for Friedrichbeckeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Friedrichbeckeite Specimen Label here :


K([ ],Na)Mg2(Be2Mg)Si12O30
Dana No: 63.02.01a.21 Strunz No: 09.CX.00





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