IMA2003-045a Mineral Data

IMA2003-045a Mineral Data

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General IMA2003-045a Information

Chemical Formula:

(Sc,Ca)2KBe3Si12O30

Composition:

Molecular Weight = 970.62 gm

Potassium 4.03 % K 4.85 % K₂O

Calcium 2.06 % Ca 2.89 % CaO

Scandium 6.95 % Sc 10.66 % Sc₂O₃

Beryllium 2.79 % Be 7.73 % BeO

Silicon 34.72 % Si 74.28 % SiO₂

Oxygen 49.45 % O

______ ______

100.00 % 100.41 % = TOTAL OXIDE

Empirical Formula:

Sc_1.5Ca_0.5KBe₃Si₁₂O₃₀

Environment:

Milarite group

IMA Status:

Proposed IMA 2004 (Dana # Added)

Locality:

Heftetjern pegmatite, southern Norway Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

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IMA2003-045a Crystallography

Axial Ratios:

a:c = 1:1.38565

Cell Dimensions:

a = 10.097, c = 13.991, Z = 2; V = 1,235.28 Den(Calc)= 2.61

Crystal System:

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

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

By Intensity(I/I_o): 3.229(1), 2.88(0.8), 4.097(0.7),3.504(0.5), 5.044(0.5), 1.751(0.4), 1.836(0.4), 7.012(0.4),

Optical Properties of IMA2003-045a

Optical Data:

NCalc= 1.56 - from Gladstone-Dale relationship (KC = 0.216) where Ncalc=Dcalc*KC+1

Calculated Properties of IMA2003-045a

Electron Density:

r_electron=2.58 gm/cc
note: r_IMA2003-045a=2.61 gm/cc.

Fermion Index

Fermion Index = 0.04434
Boson Index = 0.95566

Photoelectric:

PE_IMA2003-045a= 2.98 barns/electron
U=PE_IMA2003-045a x r_electron= 7.71 barns/cc.

Radioactivity:

GRapi = 57.57 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from IMA2003-045a - barely detectable

IMA2003-045a Classification

Dana Class:

63.2.1a.19 (63)Cyclosilicate Condensed Rings

(63.2)Milarite - Osumilite type (6x2) Double Rings

(63.2.1a)Milarite - Osumilite group (Milarite - Osumilite subgroup)

63.2.1a.1 Brannockite KSn2Li3Si12O30 P 6/mcc 6/m 2/m 2/m

63.2.1a.2 Chayesite K(Mg,Fe)4Fe(Si12O30) P 6/mcc 6/m 2/m 2/m

63.2.1a.3 Darapiosite KNa2Zr[Li(Mn,Zr)2Si12O30] P 6/mcc 6/m 2/m 2/m

63.2.1a.4 Eifelite KNa3Mg4Si12O30 P 6/mcc 6/m 2/m 2/m

63.2.1a.5 Merrihueite (K,Na)2(Fe,Mg)5Si12O30 P 6/mcc 6/m 2/m 2/m

63.2.1a.6 Osumilite-(Fe) (K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m

63.2.1a.7 Osumilite-(Mg) (K,Na)(Mg,Fe)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m

63.2.1a.8 Poudretteite KNa2B3Si12O30 P 6/mcc 6/m 2/m 2/m

63.2.1a.9 Sugilite KNa2(Fe,Mn,Al)2Li3Si12O30 P 6/mcc 6/m 2/m 2/m

63.2.1a.10 Yagiite (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 P 6/mmc 6/m 2/m 2/m

63.2.1a.11 Dusmatovite K(K,Na,[])(Mn,Y,Zr)2(Zn,Li)3Si12O30 P 6/mcc 6/m 2/m 2/m

63.2.1a.12 Milarite K2Ca4Al2Be4Si24O60·(H2O) P 6/mcc 6/m 2/m 2/m

63.2.1a.13 Sogdianite (K,Na)2(Li,Fe,Al)3ZrSi12O30 P 6/mmm 6/m 2/m 2/m

63.2.1a.14 Roedderite (Na,K)2(Mg,Fe)5Si12O30 P 6₃/mmc 6/m 2/m 2/m

63.2.1a.15 Berezanskite! KLi3Ti2Si12O30 P 6/mcc 6/m 2/m 2/m

63.2.1a.16 Shibkovite! K(Ca,Mn,Na)2(K2-x,[]x)2ZnSi12O30(x~0.8) P 6/mcc 6/m 2/m 2/m

63.2.1a.17 Trattnerite! (Fe,Mg)2(Mg,Fe)3(Si12O30) P 6/mcc 6/m 2/m 2/m

63.2.1a.18 Almarudite! K([],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30] P 6/mcc 6/m 2/m 2/m

63.2.1a.19 IMA2003-045a ! (Sc,Ca)2KBe3Si12O30 P 6/mmc 6/m 2/m 2/m

Strunz Class:

VIII/EX.00-00 VIII - Silicates

VIII/EX - Unclassified Strunz Cyklosilicates

VIII/EX.00 - Osumilite Group

Other IMA2003-045a Information

See Also:

Links to other databases for IMA2003-045a :
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)

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IMA2003-045a

(Sc,Ca)2KBe3Si12O30
Dana No: 63.2.1a.19 Strunz No: VIII/EX.00-00
Locality:

Notes: