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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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].