Kanemite Mineral Data

Kanemite Mineral Data +

General Kanemite Information

Chemical Formula:

NaHSi2O5·3(H2O)

Composition:

Molecular Weight = 214.21 gm

Sodium 10.73 % Na 14.47 % Na₂O

Silicon 26.22 % Si 56.10 % SiO₂

Hydrogen 3.29 % H 29.44 % H₂O

Oxygen 59.75 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaHSi₂O₅·3(H₂O)

IMA Status:

Approved IMA 1972

Locality:

Link to MinDat.org Location Data.

Kanemite Image

Images:

Kanemite

Comments: Yellowish white translucent micro spherical aggregate of kanemite.
Location: Kanem, Chad. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kanemite Crystallography

Axial Ratios:

a:b:c =0.2412:1:0.3548

Cell Dimensions:

a = 4.946, b = 20.502, c = 7.275, Z = 4; V = 737.71 Den(Calc)= 1.93

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P bcn

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

By Intensity(I/I_o): 4.014(1), 10.33(1), 3.435(0.9),

Crystal Structure:

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Garvie L A J , Devouard B , Groy T L , Camara F , Buseck P R , American Mineralogist , 84 (1999) p.1170-1175, Crystal structure of kanemite, NaHSi2O5.3H2O, from the Aris phonolite, Namibia

View Additional jPOWD Structure files for Kanemite
[1]

Physical Properties of Kanemite

Cleavage:

[010] Perfect, [100] Good

Color:

Colorless, White.

Density:

1.926

Diaphaniety:

Transparent to Translucent

Hardness:

4 - Fluorite

Streak:

white

Optical Properties of Kanemite

Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2416,KPDmeas= 0.2421,KC= 0.2443

Optical Data:

Biaxial (-), a=1.451, b=1.47, g=1.478, bire=0.0270, 2V(Calc)=64, 2V(Meas)=46.

Calculated Properties of Kanemite

Electron Density:

r_electron=1.98 gm/cc
note: r_Kanemite=1.93 gm/cc.

Fermion Index

Fermion Index = 0.01253
Boson Index = 0.98747

Photoelectric:

PE_Kanemite= 1.25 barns/electron
U=PE_Kanemite x r_electron= 2.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kanemite is Not Radioactive

Kanemite Classification

Dana Class:

73.1.5.1 (73)Phyllosilicate Condensed Tetrahedral Sheets

(73.1)with double layers

(73.1.5)Dana Group

73.1.5.1 Kanemite NaHSi2O5·3(H2O) P bcn 2/m 2/m 2/m

Strunz Class:

VIII/H.05-30 VIII - Silicates

VIII/H - Phyllosilicates (layered), Tetragonal or pseudotetragonal layered structures [Si4O10]4- and others

VIII/H.05 - Natrosilite - Revdite series

VIII/H.05-10 Natrosilite Na2Si2O5 P 2₁/a 2/m

VIII/H.05-30 Kanemite NaHSi2O5·3(H2O) P bcn 2/m 2/m 2/m

VIII/H.05-40 Revdite Na2Si2O5·5(H2O) C 2 2

Other Kanemite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Kanemite

NaHSi2O5·3(H2O)
Dana No: 73.1.5.1 Strunz No: VIII/H.05-30
Locality:

Notes: