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George-ericksenite

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Formula:
Na
 
6
CaMg(IO
 
3
)
 
6
(CrO
 
4
)
 
2
· 12H
 
2
O
System:MonoclinicLustre:Vitreous
Hardness:3 - 4
Name:Named after George E. Ericksen (1920-1996) of Reston, Virginia who conducted studies of nitrate deposits for the U.S.G.S.
This page provides mineralogical data about George-ericksenite.

Classification of George-ericksenite

IMA status:Approved
Strunz 8th edition ID:6/D.16-70
Nickel-Strunz 10th (pending) edition ID:4.KD.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
K : Iodates: Trigonal [IO3] pyramids (mostly).
D : Iodates with additional anions, with H2O
Dana 7th edition ID:23.1.3.1
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Type Occurrence of George-ericksenite

Type Locality:Oficina Chacabuco, Antofagasta Region, Chile

Physical Properties of George-ericksenite

Lustre:Vitreous
Hardness (Mohs):3 - 4

Crystallography of George-ericksenite

Crystal System:Monoclinic

Optical Data of George-ericksenite

Type:Biaxial (+)
RI values: nα = 1.647 nβ = 1.674 nγ = 1.704
Maximum Birefringence:δ = 0.057

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r < v weak

Chemical Properties of George-ericksenite

Formula:
Na
 
6
CaMg(IO
 
3
)
 
6
(CrO
 
4
)
 
2
· 12H
 
2
O
Essential elements:Ca, Cr, H, I, Mg, Na, O
All elements listed in formula:Ca, Cr, H, I, Mg, Na, O

Relationship of George-ericksenite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.KD.05Dietzeite
Ca
 
2
(IO
 
3
)
 
2
(CrO
 
4
) · H
 
2
O

Other Names for George-ericksenite

Synonyms:
IMA1996-049
Other Languages:
German:Georgeericksenit
Russian:Джорджэриксенит
Spanish:Georgeericksenita

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 George-ericksenite

Reference List:

- +
Mineralogical Record: 29: 470.

American Mineralogist: 83: 390-399.

Internet Links for George-ericksenite

Search Engines:
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  • Look for George-ericksenite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
  • Edwards Minerals - Fine Specimens
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  • Localities for George-ericksenite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Chile
     
    • Antofagasta Region
    Amer.Min.(1998) 83, 390-399 http://www.minsocam.org/MSA/AmMin/TOC/Articles_Free/1998/Cooper_p390-399_98.pdf
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 20th Jun 2011 15:16:57
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