Citation: Glinnemann, J.; King, H. E.; Schulz, H.; Hahn, T.; La Placa, S. J.; Dacol, F. (1992). Crystal structures of the low-temperature quartz-type phases of SiO2 and GeO2 at elevated pressure P = 7.2GPa = 72 kbar. Zeitschrift fur Kristallographie, 198, pp. 177-212.