Eitelite Mineral Data

Eitelite Mineral Data +

General Eitelite Information

Chemical Formula:

Na2Mg(CO3)2

Composition:

Molecular Weight = 190.30 gm

Sodium 24.16 % Na 32.57 % Na₂O

Magnesium 12.77 % Mg 21.18 % MgO

Carbon 12.62 % C 46.25 % CO₂

Oxygen 50.44 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂Mg(CO₃)₂

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 100482

PDF 24-1227

Eitelite Image

Images:

Eitelite

Comments: Pale yellow crystalline eitelite.
Location: Mapco Shrine Hospital Well #1 drill core, Green River Formation, Duchesne County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Eitelite Crystallography

Axial Ratios:

a:c = 1:3.31748

Cell Dimensions:

a = 4.9423, c = 16.396, Z = 3; V = 346.84 Den(Calc)= 2.73

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.602(1), 2.469(0.25), 2.731(0.25),

Crystal Structure:

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Pabst A , American Mineralogist , 58 (1973) p.211-217, The crystallography and structure of eitelite, Na2Mg(CO3)2

View Additional jPOWD Structure files for Eitelite
[1]

Physical Properties of Eitelite

Cleavage:

[0001] Distinct

Color:

Colorless, White.

Density:

2.737

Diaphaniety:

Transparent

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Eitelite

Gladstone-Dale:

CI meas= 0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1933,KPDmeas= 0.1928,KC= 0.2018

Optical Data:

Uniaxial (-), e=1.4502, w=1.6052, bire=0.1550.

Calculated Properties of Eitelite

Electron Density:

r_electron=2.70 gm/cc
note: r_Eitelite=2.73 gm/cc.

Fermion Index

Fermion Index = 0.0144
Boson Index = 0.9856

Photoelectric:

PE_Eitelite= 0.82 barns/electron
U=PE_Eitelite x r_electron= 2.21 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Eitelite is Not Radioactive

Eitelite Classification

Dana Class:

14.3.2.1 (14)Anhydrous Carbonates

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

(14.3.2)Dana Group

14.3.2.1 Eitelite Na2Mg(CO3)2 R 3 3

Strunz Class:

V/B.05-10 V - Nitrates, Carbonates and Borates

V/B - Waterfree carbonates [CO3]2- without unfamiliar anions

V/B.05 - Eitelie - Shortite - Carbocernaite series

V/B.05-10 Eitelite Na2Mg(CO3)2 R 3 3

V/B.05-20 Nyerereite Na2Ca(CO3)2 C mc2₁ mm2

V/B.05-30 Natrofairchildite Na2Ca(CO3)2 P 6₃/mmc 6/m 2/m 2/m

V/B.05-40 Gregoryite (Na2,K2,Ca)CO3 P 6₃mc 6mm

V/B.05-50 Fairchildite K2Ca(CO3)2 P 6₃/mmc 6/m 2/m 2/m

V/B.05-55 Zemkorite (Na,K)2Ca(CO3)2 P 6₃/mmc, P 6₃mc, P 6₂c- Hex

V/B.05-60 Butschliite K2Ca(CO3)2 R 3m 3 2/m

V/B.05-70 Shortite Na2Ca2(CO3)3 Amm2 mm2

V/B.05-80 Sahamalite-(Ce) (Mg,Fe)Ce2(CO3)4 P 2₁/a 2/m

V/B.05-90 Remondite-(Ce) Na3(Ce,La,Ca,Na,Sr)3(CO3)5 P 2₁ 2

V/B.05-92 Remondite-(La)! Na3(La,Ce,Ca)3(CO3)5 P 2₁ 2

V/B.05-95 Petersenite-(Ce) (Na,Ca)4(Ce,La,Nd)2(CO3)5 P 2₁ 2

V/B.05-98 Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 P 6₃mc 6mm

V/B.05-100 Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 P 6₃/mmc 6/m 2/m 2/m

V/B.05-110 Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 P 6₃mc 6mm

V/B.05-120 Carbocernaite (Ca,Na)(Sr,Ce,Ba)(CO3)2 P mc2₁ mm2

Other Eitelite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Eitelite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Eitelite Specimen Label here :

Eitelite

Na2Mg(CO3)2
Dana No: 14.3.2.1 Strunz No: V/B.05-10
Locality:

Notes: