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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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