Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Chayesite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Basalt quarry, Pauliberg Mt., Kobersdorf, Oberpullendorf, Burgenland, Austria
© O. Dziallas

Show Chayesite Photos (16)



Formula:
K(Mg,Fe)
 
4
FeSi
 
12
O
 
30
System:HexagonalColour:Blue
Hardness:5 - 6
Name:For Dr. Felix Chayes, Carnegie Institution's Geophysical Laboratory, Washington D. C.


Osumilite Group.

Classification of Chayesite

IMA status:Approved 1987
Strunz 8th edition ID:8/E.22-50
Nickel-Strunz 10th (pending) edition ID:9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
Dana 8th edition ID:63.2.1a.2

63 : CYCLOSILICATES Condensed Rings
2 : Condensed Rings (Milarite - Osumilite group)
Hey's CIM Ref.:14.24.6

14 : Silicates not Containing Aluminum
24 : Silicates of Fe, Mg and alkalis
mindat.org URL:http://www.mindat.org/min-974.html
Please feel free to link to this page.

Type Occurrence of Chayesite

Type Locality:Moon Canyon, Woodland, Summit Co., Utah, USA
General Appearance of Type Material:Laths to 100 microns.
Place of Conservation of Type Material:Smithsonian NMNH 165807
Year of Discovery:1989
Geological Setting of type material:Rock forming mineral in lamproite
Associated Minerals at type locality:
K Feldspar

Physical Properties of Chayesite

Lustre:Vitreous
Colour:Blue
Hardness (Mohs):5 - 6
Tenacity:Brittle
Cleavage:None Observed
Density (calculated):2.68 g/cm3

Crystallography of Chayesite

Crystal System:Hexagonal
Cell Parameters:a = 10.15Å, c = 14.38Å
Ratio:a:c = 1 : 1.417
Unit Cell Volume:V 1,282.99 ų (Calculated from Unit Cell)

Optical Data of Chayesite

Type:Uniaxial (+)
RI values: nω = 1.575 nε = 1.578
Maximum Birefringence:δ = 0.003

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Pleochroism:Strong
Comments:O= sky blue
E= colorless

Chemical Properties of Chayesite

Formula:
K(Mg,Fe)
 
4
FeSi
 
12
O
 
30
Essential elements:Fe, K, Mg, O, Si
All elements listed in formula:Fe, K, Mg, O, Si
Common Impurities:Ti,Al,Mn,Na,K

Relationship of Chayesite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.CM.05Armenite
BaCa
 
2
Al
 
6
Si
 
9
O
 
30
 · 2H
 
2
O
9.CM.05Brannockite
(K,Na)□
 
2
Li
 
3
(Sn,Zr,Ti)
 
2
[Si
 
12
O
 
30
]
9.CM.05Darapiosite
KNa
 
2
(Zn,Li)
 
3
(Mn,Zr)
 
2
[Si
 
12
O
 
30
]
9.CM.05Eifelite
KNa
 
3
Mg
 
4
Si
 
12
O
 
30
9.CM.05Merrihueite
(K,Na)
 
2
(Fe,Mg)
 
5
Si
 
12
O
 
30
9.CM.05Milarite
K
 
2
Ca
 
4
Al
 
2
Be
 
4
Si
 
24
O
 
60
 · H
 
2
O
9.CM.05Osumilite-(Mg)
(K,Na)(Mg,Fe)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
 · H
 
2
O
9.CM.05Osumilite
(K,Na)(Fe
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
3
(Si,Al)
 
12
O
 
30
9.CM.05Poudretteite
KNa
 
2
B
 
3
Si
 
12
O
 
30
9.CM.05Roedderite
(Na,K)
 
2
(Mg,Fe)
 
5
Si
 
12
O
 
30
9.CM.05Sogdianite
K(□,Na)
 
2
Li
 
3
(Zr,Fe,Ti)
 
2
[Si
 
12
O
 
30
]
9.CM.05Sugilite
K(Na,□)
 
2
Li
 
3
(Fe,Mn,Al,Zr)
 
2
[Si
 
12
O
 
30
]
9.CM.05Yagiite
(Na,K)
 
3
Mg
 
4
(Al,Mg)
 
6
(Si,Al)
 
24
O
 
60
9.CM.05Berezanskite
K□
 
2
Li
 
3
(Ti,Zr,Sn)
 
2
[Si
 
12
O
 
30
]
9.CM.05Dusmatovite
K(Na,□)
 
2
(Zn,Li)
 
3
(Mn
2+
 
,Y,Zr)
 
2
[Si
 
12
O
 
30
]
9.CM.05Shibkovite
K(□,K,Na)
 
2
Zn
 
3
Ca
 
2
[Si
 
12
O
 
30
]
9.CM.05Almarudite
K(□,Na)
 
2
(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(Be,Al)
 
3
[Si
 
12
O
 
30
]
9.CM.05Trattnerite
(□,K)(Mg, Fe
2+
 
)
 
3
Fe
3+
2
[Si
 
12
O
 
30
]
9.CM.05Oftedalite
(Sc,Ca,Mn
2+
 
)
 
2
K[(Be,Al)
 
3
Si
 
12
O
 
30
]
9.CM.10Faizievite
K
 
2
Na(Ca
 
6
Na)Ti
 
4
Li
 
6
[F
 
2
|Si
 
24
O
 
66
]
Related Minerals - Hey's Index Grouping:

- +
14.24.1Magnesioriebeckite
◻[Na
 
2
][Mg
 
3
Fe
3+
2
]Si
 
8
O
 
22
(OH)
 
2
14.24.2Magnesio-arfvedsonite
[Na][Na
 
2
][Mg
 
4
Fe
3+
 
]Si
 
8
O
 
22
(OH)
 
2
14.24.3Celadonite
K(Mg,Fe
2+
 
)Fe
3+
 
(Si
 
4
O
 
10
)(OH)
 
2
14.24.4Roedderite
(Na,K)
 
2
(Mg,Fe)
 
5
Si
 
12
O
 
30
14.24.5Merrihueite
(K,Na)
 
2
(Fe,Mg)
 
5
Si
 
12
O
 
30

Other Names for Chayesite

Synonyms:
IMA1987-059
Other Languages:
German:Chayesit
Russian:Чейесит
Spanish:Chayesita

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 Chayesite

Reference List:

- +
American Mineralogist: 74: 1368-1373.

Mineralogical Magazine: 58: 655-662.

Internet Links for Chayesite

Search Engines:
  • Look for Chayesite on Google
  • Look for Chayesite images on Google
    • External Links:
  • Look for Chayesite on Webmineral
  • Look for Chayesite on Athena Mineralogy
  • Look for Chayesite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Chayesite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • The Arkenstone - Fine Minerals
  • Wilensky Fine Minerals
  • SpiriferMinerals.com - high quality low prices
  • Buy fine minerals and gemstones from Pala International
  • Buy from David K Joyce minerals
  • Find Chayesite on www.crystalclassics.co.uk
  • Pricedownminerals.com - Reverse Auctions and Shop
  • webminerals
  • High-end worldwide specimens & outstanding customer service
  • Search for Chayesite from all mineral dealers at minfind.com
  • Fine Minerals from Weinrich Minerals, Inc.
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Chayesite

    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.
    Hide Locality List
    (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.
    Austria
     
    • Burgenland
      • Oberpullendorf
        • Kobersdorf
          • Pauliberg Mt.
    		O Dziallas collection; U. Kolitsch, W. Postl, H.-P. Bojar and W. Trattner (2009): Die Mineralvorkommen im Basalt des Pauliberges. In: Autorenkollektiv (Red. M. A. Götzinger und P. Huber) (2009): Die Mineralien des Burgenlandes - Geologie, Mineralogie und mineralische Rohstoffe. – Wissenschaftliche Arbeiten aus dem Burgenland, Band 126, Amt der Burgenländischen Landesregierung, Abteilung 7 - Landesmuseum, Eisenstadt, 83-99.
    Spain
     
    • Castile-La Mancha
      • Albacete
        • Cancarix
    		Lapis 2003(1), 8 Am Min 74:1368-1373
    USA
     
    • Utah
      • Summit Co.
        • Woodland
    		AM 74 (1989), 1368; HB2/1 (1995); Mitt. Abt. Miner. Landesmuseum Joanneum 60/61 (1996), 77
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 19th Jun 2011 09:00:56
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds