Hydrogen diffusion in the apatite-water system: Fluorapatite parallel to the c-axis Higashi, Yoshinori ; Itoh, Shoichi ; Hashiguchi, Minako ; Sakata, Shuhei ; Hirata, Takafumi ; Watanabe, Ken ; Sakaguchi, Isao Abstract Publication: Geochemical Journal Pub Date: 2017 DOI: 10.2343/geochemj.2.0460 Bibcode: 2017GeocJ..51..115H