Synthesis , Properties , and Structure of KrCa ( COr ) , , Buetschliite

Synthesis of both the highand low-temperature forms (fairchildite and buetschliite) by solid state reaction, one of five methods of synthesis used, suggests that the transition point is in the interval 505-585oC. Low-KrCa(COa)2, buetschliite. crj,stallizes in the space grotp R12/m(a 5.38, c 1g.12 A, Z : 3\ with an eitelite-type structure.