#154
P3221
Example – Quartz, SiO2
Structure of alpha-quartz as a function of temperature and pressure
Ogata, K.; Takeuchi, Y.; Kudoh, Y.
Zeitschrift fuer Kristallographie (1987) 179, p403-p413
http://www.webmineral.com/data/Quartz.shtml
See also this wonderful website dedicated to all aspects of the mineral quartz:
http://www.quartzpage.de/
CIF
http://1drv.ms/1pIcPKG
SiO4 tetrahedra (orange)