Mineralogy Database

Nyerereite Mineral Data

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General Nyerereite Information

Help on Chemical  Formula: Chemical Formula: Na2Ca(CO3)2
Help on Composition: Composition: Molecular Weight = 206.08 gm
   Sodium   22.31 %  Na   30.08 % Na2O
   Calcium  19.45 %  Ca   27.21 % CaO
   Carbon   11.66 %  C    42.71 % CO2
   Oxygen   46.58 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Ca(CO3)2
Help on Environment: Environment: Major constituent in carbonatite lavas. Dimorphous with zemkorite.
Help on IMA Status: IMA Status: Approved IMA 1963
Help on Locality: Locality: Mt. Oldoinyo Lengai, Tanzania. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the president of Tanzania, Julius K. Nyerere (1922-).
Help on Name Pronunciation: Name Pronunciation: Nyerereite + Pronunciation Say NYEREREITE
Help on Synonym: Synonym: IMA1963-014

Nyerereite Image

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  Nyerereite   Gregoryite

Comments: Sodium (nyereteite) and potassium (gregoryite) carbonates, not stable in normal atmosphere, collected molten from the volcano and maintained in inert argon atmosphere.
Location: Ol Doinyo Lengai Vulkan, Maasai Steppe, East Africa Rift Valley, Tanzania. See Link. Scale: Rock size 2 cm.
© Richard Dale / Dale Minerals

Nyerereite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5725:1:1.4465
Help on Cell Dimensions: Cell Dimensions: a = 5.044, b = 8.809, c = 12.743, Z = 4; V = 566.20 Den(Calc)= 2.42
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: C mc21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.046(1), 2.07(0.9), 2.16(0.9),2.54(0.9), 6.377(0.9), 4.385(0.9), 2.2(0.8), 2.58(0.8),

Physical Properties of Nyerereite

Help on Color: Color: Colorless.
Help on Density: Density: 2.541
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Streak: Streak: white

Optical Properties of Nyerereite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.063 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2174,KPDmeas= 0.207,KC= 0.2044
Ncalc = 1.49 - 1.52
Help on Optical Data: Optical Data: Biaxial (-), a=1.511, b=1.533, g=1.534, bire=0.0230, 2V(Calc)=22, 2V(Meas)=29.

Calculated Properties of Nyerereite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Nyerereite =2.54 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0017684043
Boson Index = 0.9982315957
Help on Photoelectric: Photoelectric: PENyerereite = 2.90 barns/electron
U=PENyerereite x rElectron Density= 7.29 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nyerereite is Not Radioactive

Nyerereite Classification

Help on  Dana Class: Dana Class: (14)Anhydrous Carbonates
  (14.03)with Compound Formula A+2 B++ (CO3)2
  (14.03.04)Dana Group Nyerereite Na2Ca(CO3)2 C mc21 mm2
Help on  Strunz Class: Strunz Class: 05.AC.10 05 - CARBONATES (NITRATES)
  05.A - Carbonates without additional anions, without H2O
  05.AC -Alkali and alkali-earth carbonates
05.AC.10 Nyerereite Na2Ca(CO3)2 C mc21 mm2
05.AC.10 Natrofairchildite Na2Ca(CO3)2 P 63/mmc 6/m 2/m 2/m
05.AC.10 Zemkorite (Na,K)2Ca(CO3)2 P 63/mmc, P 63mc, P 62c- Hex

Other Nyerereite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Nyerereite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 05.AC.10





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