Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Kenyaite

Big Photo

Mt Erebus, Ross Island, Victoria Land, Eastern Antarctica, Antarctica
© Maurice de Graaf

Formula:
Na
 
2
Si
 
22
O
 
41
(OH)
 
8
·6H
 
2
O
System:Monoclinic
This page provides mineralogical data about Kenyaite.

Classification of Kenyaite

IMA status:Approved
Strunz 8th edition ID:8/D.13-10
Nickel-Strunz 10th (pending) edition ID:9.HA.10

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
Dana 8th edition ID:78.7.7.1

78 : Unclassified Silicates
7 :
Hey's CIM Ref.:14.1.6

14 : Silicates not Containing Aluminum
1 : Silicates of the alkali metals
mindat.org URL:http://www.mindat.org/min-2186.html
Please feel free to link to this page.

Type Occurrence of Kenyaite

Type Locality:Lake Magadi, South Rift Valley, Rift Valley Province, Kenya
Year of Discovery:1967

Crystallography of Kenyaite

Crystal System:Monoclinic
Cell Parameters:a = 7.79Å, b = 19.72Å, c = 7.3Å
β = 95.9°
Ratio:a:b:c = 0.395 : 1 : 0.37
Unit Cell Volume:V 1,115.48 ų (Calculated from Unit Cell)

Optical Data of Kenyaite

Type:Biaxial (+)
RI values: nα = 1.480
Maximum Birefringence:δ = 1.480

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:none

Chemical Properties of Kenyaite

Formula:
Na
 
2
Si
 
22
O
 
41
(OH)
 
8
·6H
 
2
O
Essential elements:H, Na, O, Si
All elements listed in formula:H, Na, O, Si
Common Impurities:Ti,Al,Fe,Mn,Ca,K

Relationship of Kenyaite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.HA.05Ertixiite
Na
 
2
Si
 
4
O
 
9
9.HA.20Wawayandaite
Ca
 
6
Mn
 
2
BBe
 
9
Si
 
6
O
 
23
(OH,Cl)
 
15
9.HA.25Magbasite
KBa(Al,Sc)(Mg,Fe)
 
6
Si
 
6
O
 
20
F
 
2
9.HA.30Afanasyevaite
Ca
 
8
[Si
 
2
O
 
7
]OCl
 
2
9.HA.40Igumnovite
Ca
 
3
Al
 
2
(SiO
 
4
)
 
2
Cl
 
4
9.HA.50Rudenkoite
Sr
 
3
(Al
 
3.5
Si
 
3.5
)O
 
10
(OH,O)
 
8
Cl
 
2
·H
 
2
O
9.HA.55Foshallasite
Ca
 
3
[Si
 
2
O
 
7
] · 3H
 
2
O(?)
9.HA.60Nagelschmidtite
Ca
 
7
[PO
 
4
|SiO
 
4
]
 
2
9.HA.65Caryochroite
(Na,Sr)
 
3
(Fe
3+
 
,Mg)
 
10
[(O,OH)
 
9
|Ti
 
2
Si
 
12
O
 
37
] ·(H
 
2
O, O, OH)
 
17
9.HA.70Juanite
Ca
 
10
Mg
 
4
Al
 
2
Si
 
11
O
 
39
·4H
 
2
O or near
Related Minerals - Hey's Index Grouping:
14.1.1Natrosilite
Na
 
2
Si
 
2
O
 
5
14.1.2Ertixiite
Na
 
2
Si
 
4
O
 
9
14.1.3Revdite
Na
 
16
Si
 
16
O
 
27
(OH)
 
26
·28H
 
2
O
14.1.4Makatite
Na
 
2
Si
 
4
O
 
8
(OH)
 
2
·4H
 
2
O
14.1.5Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
·3H
 
2
O
14.1.7Grumantite
Na[Si
 
2
O
 
4
(OH)]·H
 
2
O
14.1.8Silinaite
NaLiSi
 
2
O
 
5
·2H
 
2
O

Other Names for Kenyaite

Synonyms:
IMA1967-018
German names:
Kenyait
Spanish names:
Kenyaita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Kenyaite

Reference List:American Mineralogist (1968): 53: 510, 2061.

Bricker, O.P. (1969), Stability constants and Gibbs free energies of formation of magadiite and kenyaite: American Mineralogist: 54: 1026-1033.

Bulletin de la Société française de Minéralogie et de Cristallographie (1972): 95: 371-382.

Internet Links for Kenyaite

Search Engines:
  • Look for Kenyaite on Google
  • Look for Kenyaite images on Google
    • External Links:
  • Look for Kenyaite on Webmineral
  • Look for Kenyaite on Athena Mineralogy
  • Look for Kenyaite on Wikipedia
  • Look for Kenyaite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Kenyaite in the Natural History Museum (London) online catalogue
  • Kenyaite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Buy Fine Minerals from mineralsweb.com
  • Wendel Minerals - Auktion & Shop
  • The Arkenstone - Fine Minerals
  • Rare and Unusual minerals at Mineralogical Research Company
  • Wilensky Fine Minerals
  • Buy Minerals and Crystals from Crystalarium.com
  • Find Kenyaite on www.crystalclassics.co.uk
  • rare and unusual minerals mainly crystallized
  • e-Rocks - Mineral Auctions and Sales
  • Fabre Minerals - search for Kenyaite specimens
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Fine Minerals from Dan Weinrich Minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Kenyaite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    These maps work faster with Firefox!
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Antarctica
     
    • Eastern Antarctica
      • Victoria Land
        • Ross Island
    Kenya
     
    • Rift Valley Province
      • South Rift Valley
    		AM 53 (1968), 2061; HB2/1 (1995)
    Namibia
     
    • Khomas Region
      • Windhoek District
        • Windhoek
          • Aris
    		G. Niedermayr (2005): Pers. comm. to U. Kolitsch
    USA
     
    • California
      • Trinity Co.
        • Trinity Center
    		www.mineralsocal.org
    • Nevada
      • Nye Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • New Mexico
      • Colfax Co.
        • Springer
          • Point of Rocks Mesa (Pecks Mesa)
    		Minerals of New Mexico 3rd ed.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.