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Comment on “A new hydrous silicate, a water reservoir, in the upper part of the lower mantle” by Eiji Ohtani, Hiroki Mizobata, Yasuhiro Kudoh, Toshiro Nagase, Haruo Arashi, Hisayoshi Yurimoto, and Isoji Miyagi
Author(s) -
Liu Lingun,
Irifune T.
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl00474
Subject(s) - silicate , diffraction , mineralogy , phase (matter) , raman spectroscopy , mantle (geology) , chemical composition , materials science , geology , analytical chemistry (journal) , chemistry , geochemistry , physics , environmental chemistry , optics , thermodynamics , organic chemistry
On the basis of the available powder X‐ray diffraction data, chemical composition, Raman spectrum and synthesis P‐T conditions, it is concluded that the so‐called new phase claimed by Ohtani et al. [1997] is in reality the phase D reported earlier by Liu [1987], Irifune et al. [1996] and Kuroda and Irifune [1997]. Phase F first reported by Kanzaki [1991] is also probably in reality the phase D. The powder X‐ray diffraction pattern of the so‐called phase F studied by Kudoh et al. [1995] bears no resemblance to that reported by Kanzaki [1991], suggesting a totally different material was employed in the study of Kudoh et al. [1995].