George-ericksenite Mineral Data (original) (raw)

General George-ericksenite Information

Help on Chemical Formula: Chemical Formula:

Na6CaMg(IO3)6(CrO4)2•12(H2O)

Help on Composition: Composition:

Molecular Weight = 1,699.91 gm

Sodium 8.11 % Na 10.94 % Na2O

Calcium 2.36 % Ca 3.30 % CaO

Magnesium 1.43 % Mg 2.37 % MgO

Chromium 6.12 % Cr 11.76 % CrO3

Hydrogen 1.42 % H 12.72 % H2O

Iodine 44.79 % I 58.91 % I2O5

Oxygen 35.77 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Na6CaMg(IO3)6(CrO4)2•12(H2O)

Help on Environment: Environment:

Arid climate and associated with the Chilean nitrate caliche deposits.

Help on IMA Status: IMA Status:

Approved IMA 1998 (Dana # Added)

Help on Locality: Locality:

Oficina Chacabuco, Chile Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after George E. Ericksen (1920-1996) of Reston, Virginia who conducted studies of nitrate deposits for the U.S.G.S.

Help on Synonym: Synonym:

Georgeericksenite - Renamed to George-ericksenite by Mineralogical Record, v39 (2008), p131

IMA1996-049

George-ericksenite Image

Click Here for Larger George-ericksenite Image in a New Browser Window Images:

Click Here for Larger George-ericksenite Image George-ericksenite Comments: Scanning electron microscope (SEM) photomicrograph of part of a georgeericksenite aggregate: note the cracking of the crystals due to H2O loss under the SEM vacuum. (AmMin 83:391). Location: Museum specimen labeled as originating from Oficina Chacabuco, Chile..Scale: See Image. © American Mineralogist

George-ericksenite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =2.1656:1:1.4442

Help on Cell Dimensions: Cell Dimensions:

a = 23.645, b = 10.918, c = 15.768, Z = 4; beta = 114.416° V = 3,706.56 Den(Calc)= 3.05

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 10.69(1), 3.051(0.8), 3.121(0.8),

Click Here for Large George-ericksenite Structure Window Crystal Structure:

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Help on Above

| | Cooper M A , Hawthorne F C , Roberts A C , Grice J D , Stirling J A R , Moffatt E A , American Mineralogist , 83 (1998) p.390-399, Georgeericksenite, Na6CaMg(IO3)6(CrO4)2(H2O)12, a new mineral from Oficina, Chacabuco, Chile: Description and crystal structure | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of George-ericksenite

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Pale yellow, Bright lemon yellow.

Help on Density: Density:

3.035

Help on Diaphaneity: Diaphaneity:

Transparent to translucent

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Acicular - Occurs as needle-like crystals.

Help on Habit: Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Help on Hardness: Hardness:

3-4 - Calcite-Fluorite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

pale yellow

Optical Properties of George-ericksenite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2213,KPDmeas= 0.2224,KC= 0.23
Ncalc = 1.7

Help on Optical Data: Optical Data:

Biaxial (+), a=1.647, b=1.674, g=1.704, bire=0.0570

Calculated Properties of George-ericksenite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.83 gm/cc
note: Specific Gravity of George-ericksenite =3.04 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0074470613
Boson Index = 0.9925529387

Help on Photoelectric: Photoelectric:

PEGeorge-ericksenite = 163.85 barns/electron
U=PEGeorge-ericksenite x rElectron Density= 463.39 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
George-ericksenite is Not Radioactive

George-ericksenite Classification

Help on Dana Class: Dana Class:

23.01.02.03 (23)Compound Iodates

(23.01)with miscellaneous formulae

(23.01.02)Fuenzalidaite Group

23.01.02.01 Fuenzalidaite K6(Na,K)4Na6Mg10(SO4)12(IO3)12•12(H2O) P 3c1 3 2/m

23.01.02.02 Carlosruizite K6(Na,K)4Na6Mg10(SeO4)12(IO3)12•12(H2O) P 3c1 3 2/m

23.01.02.03 George-ericksenite! Na6CaMg(IO3)6(CrO4)2•12(H2O) C 2/c 2/m

Help on Strunz Class: Strunz Class:

04.KD.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.K - Iodates

04.KD -Iodates with additional anions, with H2O

04.KD.10 George-ericksenite! Na6CaMg(IO3)6(CrO4)2•12(H2O) C 2/c 2/m

Other George-ericksenite Information

Help on References: References:

NAME( AmMin) PHYS. PROP.(Am.Min.,Vol.83,p390-399,1998) OPTIC PROP.(AmMin)

Help on See Also: See Also:

Links to other databases for George-ericksenite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your George-ericksenite Specimen Label here :

George-ericksenite

Na6CaMg(IO3)6(CrO4)2•12(H2O)
Dana No: 23.01.02.03 Strunz No: 04.KD.10
Locality:

Notes: