Etymology of the English word allophane
the English word allophane
derived from the Greek word allophanes, ἀλλοϕανής
derived from the Greek word allos, ἄλλος, ἄλλως ('else,' different (in many applications); differently)
derived from the Proto-Indo-European root *al-
using the Greek prefix allo-, ἀλλο-
derived from the Greek word phainomai, ϕαίνομαι