单词 | penninite |
释义 | penniniten. Mineralogy. A green or greenish-blue mineral consisting of a hydrous silicate of magnesium, ferrous iron, and aluminium, and now usually regarded as a pseudo-trigonal variety of clinochlore. Cf. pennine n. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > chlorite > penninite pennine1844 penninite1868 1868 J. D. Dana Syst. Mineral. (ed. 5) 495 Penninite. As first named, it included a green crystallized chlorite from the Pennine Alps. Hydrotalc of Necker is penninite from the Binnen valley, in the Valais. 1921 Brit. Mus. Return 159 Minerals from the asbestos mines, including..actinolite, albite, tourmaline, penninite, quartz, magnesite. 1964 Amer. Mineralogist 49 420 The bluish green variety of chlorite..is found to be a variety of penninite containing both chromium and nickel. 1996 Clays & Clay Minerals 44 398 The cleavage of two single-crystal chlorites (a clinochlore and a penninite) has been studied using angle-resolved X-ray photoelectron spectroscopy. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < |
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