Phase D: (Mg,Fe)2-xVxSiO4H2x (v: vacancy site)

Mineral name: unnamed

Discovery: Udachnaya kimberlite xenolith, Russia

＊References＊

• Liu L. G. 1986. Physics of the Earth and Planetary Interiors 42:255–262. (First synthesis) 

• Yang H., Prewitt, C. T., and Frost  D. J. 1997. American Mineralogist 82:651–654. (Crystal structure analysis by single crystal XRD)

• Suzuki A., Ohtani E., Kondo T., Kuribayashi T., Niimura N., Kurihara K., and Chatake T. 2001. Neutron diffraction study of hydrous phase G: Hydrogen in the lower mantle hydrous silicate, phase G. Geophysical research letters 28:3987–3990. (Hydrogen site analysis of phase G (=phase D) by powder neutron diffraction)

• Khisina N. R. and Wirth R. 2002. Physics and Chemistry of Minerals 29:98–111. (Discovery)

Phase E: Mg2SiO2(OH)4

Mineral name: unnamed

Discovery: Udachnaya kimberlite xenolith, Russia

＊References＊

• Kanzaki M. 1991. Physics of the Earth and Planetary Interiors 66:307–312. (First synthesis)

• Kudoh Y., Finger L. W., Hazen R. M., Prewitt C. T., Kanzaki M., and Veblen D. R. 1993. Physics and Chemistry of Minerals 19:357–360. (Crystal structure analysis by single crystal XRD)

• Khisina N.R. and Wirth, R. 1997 EOS 78:735. (abstract). (Discovery)

• Tomioka N., Okuchi T., Purevjav N., Abe J., and Harjo S. 2016. Physics and Chemistry of Minerals 43:267–275. (Hydrogen site analysis by powder neutron diffraction)

Phase Egg: AlSiO3(OH) 

Mineral name: unnamed

Discovery: Juina, Mato Grosso, Brazil (diamond inclusion) 

＊References＊

• Eggleton R. E., Boland J. N., and Ringwood A. E. 1991. Geochemical Journal 12:191–194. (First synthesis)

• Schmidt M. W., Finger L. W., Angel R. J., and Dinnebier R. E. 1998. American Mineralogist 83:881–888. (Crystal structure analysis by powder XRD)

• Wirth R., Vollmer C., Brenker F., Matsyuk S., and Kaminsky F. 2007. Earth and Planetary Science Letters 259:384–399. (Discovery)