单词 | pickeringite |
释义 | pickeringiten. Mineralogy. A mineral that is a monoclinic hydrated sulphate of aluminium and magnesium, MgAl2(SO4)4.22H2O, occurring as transparent or translucent, usually whitish, aggregates of fibrous or acicular crystals. ΘΚΠ the world > the earth > minerals > types of mineral > sulphates > [noun] > sulphates of two elements > hydrous or hydrated > aluminium-magnesium pickeringite1844 sonomaite1876 1844 A. A. Hayes in Amer. Jrnl. Sc. 46 360 Pickeringite a native magnesian alum. 1874 Rep. Geol. Surv. Missouri (Missouri Geol. Surv.) 116 A white, silky-looking mineral was obtained by Mr. Norwood from McKerrow's coal bank, which..corresponds very well with Pickeringite. 1923 Nature 14 July 75/2 Pickeringite, copiapite, alunite, and jarosite occur as vein fillings, efflorescences or imbedded crystals. 1994 Pittsburgh (Pa.) Post-Gaz. (Nexis) 15 Apr. 17 This region is represented by pickeringite from Westmoreland County, celestite and strontianite from Blair County [etc.]. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022). < n.1844 |
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