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)

Environment:

In evaporites in an interdunary depression (Andjia, Chad).

IMA Status:

Approved IMA 1972

Locality:

In the Kanem region, near Andjia, Chad. From Lake Bogoria, Rift Valley, Kenya. Link to MinDat.org Location Data.

Name Origin:

Named after Kanem, a region on the northeastern edge of Lake Chad, Chad, where the mineral was discovered.

Name Pronunciation:

Kanemite

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 - Dipyramidal H-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),

Physical Properties of Kanemite

Cleavage:

{010} Perfect, {100} Good

Color:

Colorless, White.

Density:

1.926

Diaphaneity:

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
Ncalc = 1.47

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:

Bulk Density (Electron Density)=1.98 gm/cc
note: Specific Gravity of Kanemite =1.93 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Kanemite= 1.25 barns/electron
U=PE_Kanemite x rElectron Density= 2.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kanemite is Not Radioactive

Kanemite Classification

Dana Class:

73.01.05.01 (73)Phyllosilicate Condensed Tetrahedral Sheets

(73.01)with double layers

(73.01.05)Dana Group

73.01.05.01 Kanemite NaHSi2O5•3(H2O) P bcn 2/m 2/m 2/m

Strunz Class:

09.EF.25 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EF -Single nets with 6-membered rings, ï¿½ other rings

09.EF.25 Kanemite NaHSi2O5•3(H2O) P bcn 2/m 2/m 2/m

Other Kanemite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Kanemite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Kanemite

NaHSi2O5•3(H2O)
Dana No: 73.01.05.01 Strunz No: 09.EF.25
Locality:

Notes:

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