Friedrichbeckeite Mineral Data

[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery]
John Betts - Fine Minerals
Classic minerals, out-of-print books & magazines, plus informative articles for collectors

General Friedrichbeckeite Information

Chemical Formula:

K([ ],Na)Mg2(Be2Mg)Si12O30

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

Empirical Formula:

K_0.87Na_0.86Mg_1.57Mn²⁺_0.28Fe²⁺_0.24Be_1.83Mg_1.17Si₁₂O₃₀

Environment:

Found in a single silicate-rich xenolith in volcanic rocks. Milarite group. Mg-dominant analogue of almarudite, milarite or oftedalite.

IMA Status:

Approved IMA 2008 (Dana # Added)

Locality:

Bellerberg, Ettringen, Eifel, Germany Link to MinDat.org Location Data.

Name Origin:

Named for Friedrich Johann Karl Becke (1855-1931), Austrian mineralogist and petrographer.

Name Pronunciation:

Friedrichbeckeite + Pronunciation

Synonym:

IMA2008-019

Search for Friedrichbeckeite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Friedrichbeckeite Crystallography

Axial Ratios:

a:c = 1:1.41725

Cell Dimensions:

a = 9.97, c = 14.13, Z = 2; V = 1,216.36 Den(Calc)= 2.68

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Lengauer C L , Hrauda N , Kolitsch U , Krickl R , Tillmanns E , Mineralogy and Petrology , 96 (2009) p.221-232

Physical Properties of Friedrichbeckeite

Cleavage:

None

Color:

Light yellow.

Diaphaneity:

Transparent

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Friedrichbeckeite

Gladstone-Dale:

CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2076,KC= 0.2069
Ncalc = 1.55

Optical Data:

Uniaxial (+), w=1.552, e=1.561, bire=0.0090.

Calculated Properties of Friedrichbeckeite

Electron Density:

Bulk Density (Electron Density)=2.66 gm/cc
note: Specific Gravity of Friedrichbeckeite =2.68 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Friedrichbeckeite}= 2.65 barns/electron
U=PE_{Friedrichbeckeite} x r_electron= 7.05 barns/cc.

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

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

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

References:

NAME( Mineralogy and Petrology) PHYS. PROP.(Mineralogy and Petrology) OPTIC PROP.(Mineralogy and Petrology)

See Also:

Links to other databases for Friedrichbeckeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Friedrichbeckeite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Friedrichbeckeite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Friedrichbeckeite Mineral Data :

Ask about Friedrichbeckeite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Friedrichbeckeite

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

Notes: