| 释义 |
alunogen Min.|əˈl(j)uːnədʒɪn|
[mod. (Fr. alunogène 1832) f. Fr. alun alum + -gen, taken as = producing.]
A mineral, also called Keramohalite, a hydrous sulphate of alumina, occurring as a feathery efflorescence, to which, among other substances, the names hair-salt and feather-alum are applied. (Halotrichite, sometimes used as a synonym, is applied by Dana to a distinct mineral.)
1868Dana Min. 650 This species was made known by Beudant, and by him first named Alunogen. 1868Watts Dict. Chem. V. 579 The normal or neutral sulphate [of aluminium] Al2(SO4)3..is known mineralogically as alunogen, hair-salt, feather-alum, and halotrichite. 1878Lawrence Cotta's Rocks Class. 43 Alunogen is sometimes the product of volcanic action, sometimes a result of the decomposition of pyrites in coal districts. |