| 释义 |
riebeckite Min.|ˈriːbɛkaɪt|
[ad. G. riebeckit (A. Sauer 1888, in Zeitschr. d. Deut. geol. Ges. XL. 138), f. the name of Emil Riebeck (d. 1885), German explorer: see -ite1.]
A mineral of the monoclinic amphibole group, Na2Fe2+3Fe3+2Si8O22(OH)2, found as dark blue or black prismatic crystals and often containing magnesium.
1889Jrnl. Chem. Soc. LVI. 109 This hornblende, named riebeckite, has the same composition as arfvedsonite, and is the analogue of ägirin of the augite series. 1941Proc. Prehist. Soc. VII. 65 This hornblende..recalls the habit and mode of occurrence of riebeckite in the paisanites. 1965G. J. Williams Econ. Geol. N.Z. ix. 141/1 It should not pass unnoticed that the Taipo Valley thorite occurrence also contains rutile..and that the presence of riebeckite suggests an alkali environment. 1977A. Hallam Planet Earth 136/2 Riebeckite is a member of the amphibole group. |