New compounds in the system Ca/Ni/Si

作者：Glaser J^*

来源：Zeitschrift fur Anorganische und Allgemeine Chemie, 2002, 628(9-10): 1946-1950.

DOI：10.1002/1521-3749(200209)628:9/10<1946::AID-ZAAC1946>3.0.CO;2-I

• calcium nickel silicides
• crystal structure
• ReB3 type

The new compounds CaNi2Si and Ca3Ni3Si2 were synthesized in the Ca-Ni-Si-system and their structures determined by single crystal X-ray diffraction. CaNi2Si crystallizes in the space group P6(3)/MMC (no. 194) with the lattice parameters a = 400.38(5) pm, c = 988.6(2) pin and Z = 2 (R1 = 0.0307, wR2 = 0.0553 for all symmetry-independent reflections) in a site occupancy variant of the ReB3 type. The unit cell Of Ca3Ni3Si2 was found to be orthorhombic with a = 926.59(5) pin, b = 396.69(2) pm and c = 1814.1(2) pin (Prima, no. 62, Z = 4, R I = 0.0435, wR2 = 0.0605 for all symmetry-independent reflections). The nickel and silicon atoms build puckered two dimensional layers which are separated by the calcium atoms.

• 出版日期2002-9