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Nyerereite

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

Show Nyerereite Photos (2)
Formula:
Na
 
2
Ca(CO
 
3
)
 
2
System:OrthorhombicColour:Colourless


Eitelite Group.

Classification of Nyerereite

IMA status:Approved
Strunz 8th edition ID:5/B.05-20
Nickel-Strunz 10th (pending) edition ID:5.AC.10

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
C : Alkali and alkali-earth carbonates
Dana 8th edition ID:14.3.4.1

14 : ANHYDROUS NORMAL CARBONATES
3 : A2B(XO3)2
Hey's CIM Ref.:11.1.10

11 : Carbonates
1 : Carbonates of the alkali metals and ammonium
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Type Occurrence of Nyerereite

Type Locality:Mt. Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania
Year of Discovery:1963

Physical Properties of Nyerereite

Diaphaneity (Transparency):Transparent
Colour:Colourless
Density (measured):2.41 g/cm3

Crystallography of Nyerereite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Cmc21
Cell Parameters:a = 5.04Å, b = 8.8Å, c = 12.74Å
Ratio:a:b:c = 0.573 : 1 : 1.448
Unit Cell Volume:V 565.04 ų (Calculated from Unit Cell)
Z:4
Morphology:Platy crystals to 0.5 mm.
Twinning:Always twinned.

Optical Data of Nyerereite

Type:Biaxial (-)
RI values: nα = 1.511 nβ = 1.533 nγ = 1.535
2V:Measured: 29° , Calculated: 28°
Maximum Birefringence:δ = 0.023

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:strong

Chemical Properties of Nyerereite

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

Relationship of Nyerereite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.AC.05Eitelite
Na
 
2
Mg(CO
 
3
)
 
2
5.AC.10Zemkorite
Na
 
2
Ca(CO
 
3
)
 
2
5.AC.15Bütschliite
K
 
2
Ca(CO
 
3
)
 
2
5.AC.20Fairchildite
K
 
2
Ca(CO
 
3
)
 
2
5.AC.25Shortite
Na
 
2
Ca
 
2
(CO
 
3
)
 
3
5.AC.30Burbankite
(Na,Ca)
 
3
(Sr,Ba,Ce)
 
3
(CO
 
3
)
 
5
5.AC.30Calcioburbankite
Na
 
3
(Ca,REE,Sr)
 
3
(CO
 
3
)
 
5
5.AC.30Khanneshite
(Na,Ca)
 
3
(Ba,Sr,Ce,Ca)
 
3
(CO
 
3
)
 
5
5.AC.30Sanrománite
Na
 
2
CaPb
 
3
[CO
 
3
]
 
5
Related Minerals - Hey's Index Grouping:

- +
11.1.1Zabuyelite
Li
 
2
CO
 
3
11.1.2Natrite
Na
 
2
CO
 
3
11.1.3Nahcolite
NaHCO
 
3
11.1.4Wegscheiderite
Na
 
5
H
 
3
(CO
 
3
)
 
4
11.1.5Thermonatrite
Na
 
2
CO
 
3
·H
 
2
O
11.1.6Trona
Na
 
3
H(CO
 
3
)
 
2
·2H
 
2
O
11.1.7Natron
Na
 
2
CO
 
3
·10H
 
2
O
11.1.8Kalicinite
KHCO
 
3
11.1.9Shortite
Na
 
2
Ca
 
2
(CO
 
3
)
 
3
11.1.11Natrofairchildite
11.1.12Zemkorite
Na
 
2
Ca(CO
 
3
)
 
2
11.1.13Pirssonite
Na
 
2
Ca(CO
 
3
)
 
2
·2H
 
2
O
11.1.14Gaylussite
Na
 
2
Ca(CO
 
3
)
 
2
·5H
 
2
O
11.1.15Baylissite
K
 
2
Mg(CO
 
3
)
 
2
·4H
 
2
O
11.1.16Fairchildite
K
 
2
Ca(CO
 
3
)
 
2
11.1.17Bütschliite
K
 
2
Ca(CO
 
3
)
 
2
11.1.18Teschemacherite
(NH
 
4
)HCO
 
3

Other Names for Nyerereite

Synonyms:
IMA1963-014Natrofairchildite
Other Languages:
German:Nyerereit
Russian:Ниеререит
Spanish:Nyerereita

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 Nyerereite

Reference List:American Mineralogist (1975): 60: 487-488.

Zeitschrift für Kristallographie (1977): 145: 73-95.

American Mineralogist (1978): 63: 600.

Internet Links for Nyerereite

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    Localities for Nyerereite

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