Superstructure of alpha-phase potassium nitrate.
The structure of potassium nitrate, KNO(3), has been redetermined at room temperature. The compound surprisingly shows a 2 x 2 x 1 superstructure and crystallizes in space group Cmc2(1). This result contrasts with that found in former investigations, which gave the supergroup Pmcn, neglecting the superstructure. The improved results are due to the employment of a CCD area detector.
Adiwidjaja
Gunadi
G
Mineralogisch-Petrographisches Institut, Universität Hamburg, Grindelallee 48, D-20146 Hamburg, Germany.
Pohl
Dieter
D