eckermannit Mineral Data, minerology database

Mineral Reference Lookup for eckermannit

This reference page contains mineralogic data for eckermannit and folklore and metaphysical beliefs. If the mineral is an alternate naming of a more common name, the more common mineral's data is displayed below the list of synonyms.

Minerals matching eckermannit in the database: Eckermannit Eckermannita Eckermannite

Mineralogical Reference

eckermannit

Mineral	Eckermannit
Synonym	Eckermannite

Eckermannite (synonym)

Mineral	Eckermannite
Chemistry	NaNa 2 [Mg 4 Al][Si 8 O 22 ](OH) 2
Color	Dark bluish-Green to Greenish -black .
Luster	Vitreous
CrystalSystem	Monoclinic
Hardness	5 - 6
Streak	Pale to dark blue-grey.
IMAStatus	Approved
Discovered	1942
CellParameters	a = 9.76b = 17.89c = 5.28 β=103.16°
Ratio	a:b:c = 0.546 : 1 : 0.295
OpticalType	Biaxial (-)
RI	n α =1.612 - 1.638 n β =1.625 - 1.652 n
Birefringence	δ=0.018
SurfaceRelief	Moderate
Synonyms	Eckermannit Eckermannita
TypeLocality	Norra Kärr Gränna Jönköping Småland Sweden
Strunz	8/F.08-70 8 : Silicates F : Inosilicates (chain and band) double chains [Si2O6]4- 08 : Amphibole groupGlaucophane - Riebeckite - Kozulite series