I Zeiringer, X Cheng, XQ Chen, E Bauer, G Giester… - Science, 2015 - researchgate.net
P6‒m2; a= 0.28137 (5) and c= 0.2828 (1) nm) has been con-firmed by X-ray powder
diffraction. By means of the first-principle calculations, in combination with the evolutionary …