halotrichiten.
/haˈlɒtrɪkʌɪt/ Mineralogy.
A mineral consisting of a hydrated sulphate of iron and aluminium, occurring in yellowish-white, fibrous masses; also called feather alum.Chemical formula: FeAl2(SO4)4·22H2O. Crystal system: monoclinic.
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iron alum1844
halotrichite1849
1849 J. Nicol Man. Mineral. 323.
1868 J. D. Dana Syst. Mineral. (ed. 5) 654 Halotrichite, Silky fibrous. Yellowish-white. Taste inky-astringent.
1875 H. B. Cornwall et al. tr. Plattner's Man. Anal. Blowpipe (rev. ed.) 208 Halotrichite fuses in the matrass in its water of crystallization.
This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2022).
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