allophane Mineral Data, minerology database

Mineral Reference Lookup for allophane

This reference page contains mineralogic data for allophane 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 allophane in the database: Allophane Allophane opal Opal-Allophane Plumballophane Plumboallophane

Mineralogical Reference

allophane

Mineral	Allophane
Chemistry	(Al 2 O 3 )(SiO 2 ) 1.3-2 ·2.5-3H 2 O
Color	blue Green brown colourlessYellow white
Luster	VitreousPearly
CrystalSystem	Amorphous
Cleavage	None Observed None
Hardness	3
Streak	White
Occurences	A weathering product of volcanic ash; also a hydrothermal alteration product of feldspars.
IMAStatus	Approved
Discovered	1816
TypeLocality	Gräfenthal Saalfeld Thuringia Germany
Strunz	8/H.26-10 8 : Silicates H : Phyllosilicates (layered)Tetragonal or pseudotetragonal layered structures [Si4O10]4- and others 26 : Allophane - Sturtite series

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