Alum schist
Alum schist Al"um schist", Alum shale Al"um shale", (Min.) A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • alum schist — noun see alum shale …   Useful english dictionary

  • Alum shale — Alum schist Al um schist , Alum shale Al um shale , (Min.) A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock. [1913 Webster] …   The Collaborative International Dictionary of English

  • Alum — This article is about the chemical compound. For other uses, see Alum (disambiguation). Bulk alum Alum (  / …   Wikipedia

  • alum shale — noun or alum slate also alum schist : a shale or clay slate originally containing pyrite and after weathering containing aluminum sulfate formed by the action of sulfuric acid from the decomposition of the pyrite on the aluminous materials of the …   Useful english dictionary

  • Alum slate — Slate Slate (sl[=a]t), n. [OE. slat, sclat, OF. esclat a shiver, splinter, F. [ e]clat, fr. OF. esclater to shiver, to chip, F. [ e]clater, fr. OHG. sleizen to tear, slit, split, fr. sl[=i]zan to slit, G. schleissen. See {Slit}, v. t., and cf.… …   The Collaborative International Dictionary of English

  • Ampelite — Am pe*lite ([a^]m p[ e]*l[imac]t), n. [L. ampelitis, Gr. ampeli^tis, fr. a mpelos vine.] (Min.) An earth abounding in pyrites, used by the ancients to kill insects, etc., on vines; applied by Brongniart to a carbonaceous alum schist. [1913… …   The Collaborative International Dictionary of English

  • Adhesive slate — Slate Slate (sl[=a]t), n. [OE. slat, sclat, OF. esclat a shiver, splinter, F. [ e]clat, fr. OF. esclater to shiver, to chip, F. [ e]clater, fr. OHG. sleizen to tear, slit, split, fr. sl[=i]zan to slit, G. schleissen. See {Slit}, v. t., and cf.… …   The Collaborative International Dictionary of English

  • Aluminous slate — Slate Slate (sl[=a]t), n. [OE. slat, sclat, OF. esclat a shiver, splinter, F. [ e]clat, fr. OF. esclater to shiver, to chip, F. [ e]clater, fr. OHG. sleizen to tear, slit, split, fr. sl[=i]zan to slit, G. schleissen. See {Slit}, v. t., and cf.… …   The Collaborative International Dictionary of English

  • Bituminous slate — Slate Slate (sl[=a]t), n. [OE. slat, sclat, OF. esclat a shiver, splinter, F. [ e]clat, fr. OF. esclater to shiver, to chip, F. [ e]clater, fr. OHG. sleizen to tear, slit, split, fr. sl[=i]zan to slit, G. schleissen. See {Slit}, v. t., and cf.… …   The Collaborative International Dictionary of English

  • Hornblende slate — Slate Slate (sl[=a]t), n. [OE. slat, sclat, OF. esclat a shiver, splinter, F. [ e]clat, fr. OF. esclater to shiver, to chip, F. [ e]clater, fr. OHG. sleizen to tear, slit, split, fr. sl[=i]zan to slit, G. schleissen. See {Slit}, v. t., and cf.… …   The Collaborative International Dictionary of English

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