Natrofairchildite Mineral Data (original) (raw)

General Natrofairchildite 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:

Found in burbankite-calcite veins. Nyerereite (1968) has priority over natrofairchildite (1971) even though the 1968 article was just an abstract.

Help on IMA Status: IMA Status:

Approved IMA 1971

Help on Locality: Locality:

Vuori-Jarvi massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named as the Na analog of fairchildite.

Help on Name Pronunciation: Name Pronunciation:

Natrofairchildite + Pronunciation Say NATROFAIRCHILDITE

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Natrofairchildite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:2.4982

Help on Cell Dimensions: Cell Dimensions:

a = 5.291, c = 13.218, Z = 2; V = 320.46 Den(Calc)= 2.14

Help on Crystal System: Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.67(1), 2.64(0.9), 6.71(0.6),

Physical Properties of Natrofairchildite

Help on Cleavage: Cleavage:

{0001} Distinct

Help on Color: Color:

White.

Help on Density: Density:

2.541

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Habit: Habit:

Aggregates - Made of numerous individual crystals or clusters.

Help on Habit: Habit:

Fan Shaped - Occurs as radiating crystals shaped like a fan.

Help on Habit: Habit:

Platy - Sheet forms (e.g. micas).

Help on Hardness: Hardness:

2.5 - Finger Nail

Help on Luminescence: Luminescence:

Fluorescent, Short UV=orange, Long UV=orange.

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Natrofairchildite

Help on Dichroism (e): Dichroism (e):

colorless.

Help on Dichroism (w): Dichroism (w):

colorless.

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.125 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2299,KPDmeas= 0.1936,KC= 0.2044
Ncalc = 1.44 - 1.52

Help on Optical Data: Optical Data:

Uniaxial (-), e=1.459, w=1.525, bire=0.0660.

Calculated Properties of Natrofairchildite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Natrofairchildite =2.54 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0017684043
Boson Index = 0.9982315957

Help on Photoelectric: Photoelectric:

PENatrofairchildite = 2.90 barns/electron
U=PENatrofairchildite x rElectron Density= 7.29 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Natrofairchildite is Not Radioactive

Natrofairchildite Classification

Help on Dana Class: Dana Class:

14.03.05.01 (14)Anhydrous Carbonates

(14.03)with Compound Formula A+2 B++ (CO3)2

(14.03.05)Dana Group

14.03.05.01 Natrofairchildite Na2Ca(CO3)2 P 63/mmc 6/m 2/m 2/m

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 Natrofairchildite Information

Help on References: References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

Help on See Also: See Also:

Links to other databases for Natrofairchildite :
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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Ask about Natrofairchildite here :
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Print or Cut-and-Paste your Natrofairchildite Specimen Label here :

Natrofairchildite

Na2Ca(CO3)2
Dana No: 14.03.05.01 Strunz No: 05.AC.10
Locality:

Notes: