magnesioriebeckiten.
/maɡˌniːzɪəʊˈriːbəkʌɪt/, /maɡˌniːzɪəʊˈriːbɛkʌɪt/, U.S. /mæɡˌnizioʊˈribəˌkaɪt/, /mæɡˌnizioʊˈribɛkˌaɪt/ Mineralogy.
An amphibole mineral occurring as elongated or asbestos-like dark blue fibres. Cf. rhodusite n.Magnesioriebeckite is a variety of riebeckite in which some of the iron is replaced by magnesium, Na2(Mg,Fe+2)3Fe2+3Si8O22(OH)2. Crystal system: monoclinic.
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the world > the earth > minerals > types of mineral > silicates > amphibole (double chain) > [noun] > riebeckite
riebeckite1888
rhodusite1894
magnesioriebeckite1957
1957 A. Miyashiro in Jrnl. Faculty Sci. Tokyo Univ. Section II 11 63 Their magnesium analogues will be called magnesioriebeckite.
1992 W. A. Deer et al. Introd. Rock-forming Minerals (ed. 2) 262 Alkali amphiboles..with <0.5(Na+K) in A are members of a solid-solution series defined by four end-members, glaucophane, magnesioriebeckite, ferroglaucophane and riebeckite.
This is a new entry (OED Third Edition, March 2004; most recently modified version published online March 2022).
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