Kenyaite Mineral Data

General Kenyaite Information

Chemical Formula:

Na2Si22O41(OH)8•6(H2O)

Composition:

Molecular Weight = 1,563.99 gm

Sodium 2.94 % Na 3.96 % Na₂O

Silicon 39.51 % Si 84.52 % SiO₂

Hydrogen 1.29 % H 11.52 % H₂O

Oxygen 56.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂Si₂₂O₄₁(OH)₈•6(H₂O)

Environment:

Formed by the leaching of magadiite, and from saline brines in playa evaporite alkaline lake deposits.

IMA Status:

Approved IMA 1967

Locality:

Lake Magadi, Kenya. Link to MinDat.org Location Data.

Name Origin:

Named for the country of origin.

Name Pronunciation:

Kenyaite

Kenyaite Image

Images:

Kenyaite

Comments: Compact granular massive kenyaite possibly with other phases.
Location: Lake Magadi, Rift Valley Province, Kenya. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kenyaite Crystallography

Axial Ratios:

a:b:c =0.395:1:0.3504

Cell Dimensions:

a = 7.79, b = 19.72, c = 6.91, Z = 1; beta = 95.9° V = 1,055.88 Den(Calc)= 2.46

Crystal System:

Monoclinic Space Group: P?

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

By Intensity(I/I_o): 19.68(1), 3.428(0.85), 9.925(0.5),

Physical Properties of Kenyaite

Color:

White.

Density:

3.18

Habit:

Concretionary - Rounded massive fine-grained materials.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Luminescence:

Sometimes Fluorescent, Short UV=very pale yellow.

Streak:

white

Optical Properties of Kenyaite

Gladstone-Dale:

CI meas= 0.322 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.123 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1951,KPDmeas= 0.1509,KC= 0.2225
Ncalc = 1.55 - 1.71

Optical Data:

Biaxial (+), a=1.48, 2V(Meas)=small.

Calculated Properties of Kenyaite

Electron Density:

Bulk Density (Electron Density)=2.49 gm/cc
note: Specific Gravity of Kenyaite =2.46 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Kenyaite= 1.59 barns/electron
U=PE_Kenyaite x rElectron Density= 3.95 barns/cc.

Radioactivity:

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

Kenyaite Classification

Dana Class:

78.07.07.01 (78)Unclassified silicates

(78.07)wholly unclassified silicates

(78.07.07)Dana Group

78.07.07.01 Kenyaite Na2Si22O41(OH)8•6(H2O) P? Mono

Strunz Class:

09.HA.10 09 - SILICATES (Germanates)

09.H - Unclassified Silicates

09.HA -With alkali and alkali-earth Elements

09.HA.10 Kenyaite Na2Si22O41(OH)8•6(H2O) P? Mono

Other Kenyaite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

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

Kenyaite

Na2Si22O41(OH)8•6(H2O)
Dana No: 78.07.07.01 Strunz No: 09.HA.10
Locality:

Notes:

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