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Gregoryite

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Big Photo

Mt. Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania
© Knut Eldjarn

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Formula:
(Na
 
2
,K
 
2
,Ca)CO
 
3
System:Hexagonal
This page provides mineralogical data about Gregoryite.

Classification of Gregoryite

IMA status:Approved
Strunz 8th edition ID:5/B.05-40
Nickel-Strunz 10th (pending) edition ID:5.AA.10

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
A : Alkali carbonates
Dana 8th edition ID:14.1.2.2

14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
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Type Occurrence of Gregoryite

Type Locality:Mt. Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania
Year of Discovery:1980

Crystallography of Gregoryite

Crystal System:Hexagonal
Cell Parameters:a = 5.21Å, c = 6.58Å
Ratio:a:c = 1 : 1.263
Unit Cell Volume:V 154.68 ų (Calculated from Unit Cell)

Chemical Properties of Gregoryite

Formula:
(Na
 
2
,K
 
2
,Ca)CO
 
3
Essential elements:C, Na, O
All elements listed in formula:C, Ca, K, Na, O

Relationship of Gregoryite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.AA.05Zabuyelite
Li
 
2
CO
 
3
5.AA.10Natrite
Na
 
2
CO
 
3
5.AA.15Nahcolite
NaHCO
 
3
5.AA.20Kalicinite
KHCO
 
3
5.AA.25Teschemacherite
(NH
 
4
)HCO
 
3
5.AA.30Wegscheiderite
Na
 
5
H
 
3
(CO
 
3
)
 
4

Other Names for Gregoryite

Synonyms:
IMA1981-045
Other Languages:
German:Gregoryit
Spanish:Gregoryita

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 Gregoryite

Reference List:

- +
American Mineralogist: 66: 879.

Internet Links for Gregoryite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Gregoryite details from Handbook of Mineralogy (PDF)
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    • Localities for Gregoryite

    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.
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    (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.
    Tanzania
     
    • Arusha Region
    		Lithos 13 (1980), 213; American Mineralogist, 66, pp. 879 (1981); Mineralogical Magazine 1997 61 : 779-789
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    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: 20th Jun 2011 12:25:23
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