Mindat Short Description
Amorphous hydrous silicate of aluminium, composition not fixed. Principal member of the nominal "Allophane Group." Copper-bearing varieties can be confused with chrysocolla. Colourless varieties may be confused with hyalite.
The nano-sized partic...
Geoscience Ontology Status Notes
Hausmann J F L, Stromeyer F (1816) Report at the Royal Academy of Sciences Göttingen meeting 13 July, 1816 on silberkupferglanz and allophan, Göttingische Gelehrte Anzeigen 2, 1249-1253
IMA Formula (from Mindat)
Al2O3(SiO2)1.3-2.0 · 2.5-3.0H2O
RRUFF Formula (from Geoscience Ontology)
Al2O3(SiO2)1.3-2.0·2.5-3.0H2O