title: Materials: Ultrahard polycrystalline diamond from graphite.
authors.affiliation: Geodynamics Research Center, Ehime University, Matsuyama 790-8577, Japan. irifune@dpc.ehime-u.ac.jp
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Irifune
authors.forename: Ayako
authors.initials: A
authors.lastname: Kurio
authors.forename: Shizue
authors.initials: S
authors.lastname: Sakamoto
authors.forename: Toru
authors.initials: T
authors.lastname: Inoue
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Sumiya