Cryptophyllite Mineral Data

General Cryptophyllite Information

Chemical Formula:

K2Ca[Si4O10]•5H2O

Composition:

Molecular Weight = 480.69 gm

Potassium 16.27 % K 19.60 % K₂O

Calcium 8.34 % Ca 11.67 % CaO

Silicon 23.37 % Si 50.00 % SiO₂

Hydrogen 2.10 % H 18.74 % H₂O

Oxygen 49.93 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂CaSi₄O₁₀•5(H₂O)

Environment:

New structure type

IMA Status:

Proposed IMA 2009

Locality:

Tsentralï¿½nyi mine, Khibiny alkaline complex, Kola Peninsula, Russia Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2008-061

Cryptophyllite Crystallography

Axial Ratios:

a:b:c =0.9287:1:4.5891

Cell Dimensions:

a = 6.4934, b = 6.9919, c = 32.087, beta = 94.68° V = 1,451.93

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/n

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

By Intensity(I/I_o): 16.01(1), 2.903(0.84), 6.24(0.48),2.995(0.47), 3.197(0.27), 7.98(0.24), 2.623(0.23), 3.228(0.22),

Optical Properties of Cryptophyllite

Optical Data:

Calculated Properties of Cryptophyllite

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Cryptophyllite}= 3.54 barns/electron
U=PE_{Cryptophyllite} x r_electron= . barns/cc.

Radioactivity:

GRapi = 238.29 (Gamma Ray American Petroleum Institute Units)
Concentration of Cryptophyllite per GRapi unit = 0.42 (%)

Estimated Radioactivity from Cryptophyllite - barely detectable

Cryptophyllite Classification

Dana Class:

78.00.00.00 (78)Unclassified Silicate Minerals

(78.00)Without Dana Classification Numbers

(78.00.00)Silicate, Unclassified

78.00.00.00 Almbosite? Fe5Fe4V4Si3O27 Ortho ? Ortho

78.00.00.00 Chelyabinskite* (Ca,Mg)3Si(OH)6(SO4,CO3)2•9(H2O) Unk Ortho

78.00.00.00 Cryptophyllite K2Ca[Si4O10]•5H2O P 2₁/n 2/m

78.00.00.00 IMA2007-041T Na2[Ti4O2(OH)2(SiO4)3]•6H2O R 3m 3m

78.00.00.00 IMA2009-001 Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O22[(OH),F]43(H2O)1.5 R 3 3

78.00.00.00 Iddingsite? MgO.Fe2O3.3SiO2•4(H2O) Ortho

78.00.00.00 Ivanyukite-Cu Cu[Ti4(OH)2O2(SiO4)3]•7H2O P 4 3m 4 3m

78.00.00.00 Ivanyukite-K K2[Ti4(OH)2O2(SiO4)3]•9H2O P 4 3m 4 3m

78.00.00.00 Ivanyukite-Na Na2[Ti4O2(OH)2(SiO4)3]•6H2O P 4 3m 4 3m

78.00.00.00 Plumbophyllite Pb2Si4O10•H2O P bcn 2/m 2/m 2/m

78.00.00.00 Sturtite? (Fe3)(Mn2,Ca,Mg)Si4O10(OH)3•10(H2O) None

Strunz Class:

09.HX.00 09 - SILICATES (Germanates)

09.H - Unclassified Strunz Silicates

09.HX -Silicate, Unclassified

09.HX.00 Iddingsite? MgO.Fe2O3.3SiO2•4(H2O) Ortho

09.HX.00 IMA2007-041T Na2[Ti4O2(OH)2(SiO4)3]•6H2O R 3m 3m

09.HX.00 Plumbophyllite Pb2Si4O10•H2O P bcn 2/m 2/m 2/m

09.HX.00 Cryptophyllite K2Ca[Si4O10]•5H2O P 2₁/n 2/m

Other Cryptophyllite Information

See Also:

Links to other databases for Cryptophyllite :
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 Cryptophyllite Specimen Label here :

Cryptophyllite

K2Ca[Si4O10]•5H2O
Dana No: 78.00.00.00 Strunz No: 09.HX.00
Locality:

Notes:

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