| 释义 |
allophane Min.|ˈæləʊfeɪn|
[mod. ad. Gr. ἀλλοϕανής appearing otherwise, f. ἄλλος other + ϕαίνειν to show, appear.]
A mineral classed by Dana as the first of his Sub-silicates; a hydrated silicate of alumina, with colour sky-blue, green, brown, or yellow, which it loses under the blowpipe; whence the name.
1843W. Humble Dict. Geol., Allophane..gelatinizes in acids. 1875Ure Dict. Arts I. 90 Allophanes have been found containing from 14 to 19 per cent. of oxide of copper, which gives them a green colour. |