alunogen


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alunogen

[ə′lün·ə·jən]
(mineralogy)
Al2(SO4)3·18H2O A white mineral occurring as a fibrous incrustation of hydrated aluminum sulfate by volcanic action or decomposition of pyrite. Also known as feather alum; hair salt.
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References in periodicals archive ?
1961, Ein Vorkommen von Alunogen Keramohalit im Elbsandsteingebiet.
1998, Weathering of sandstone by alunogen and alum salts.
These equations were used to produce diagrams of amorphous aluminium hydroxide, alunite, alunogen, basaluminite, gibbsite, and jurbanite solubility plus the observed constant [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII], in terms of pAl[(OH).
Figure 5 displays the solubility lines for minerals often associated with acid drainage, such as amorphous aluminium hydroxide, alunite, alunogen, basaluminite, and gibbsite, plus jurbanite and the 'equilibrium' line established by van Breemen (1973) for his experimentally observed constant value for [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII].
Pentahydrite was reported with epsomite in one analysis and with alunogen in another (Hobbs, 1905; Palache et al.
Alunogen is found as thin colorless plates with elongated pseudohexagonal outline (almost micaceous in aspect), about 0.