Synthesis of a new orthorhombic metastable form of CdS through solid-state reactions

1989-5
Bi̇lgi̇n, M.
Kızılyallı, Meral
Usanmaz, Ali
CdS has been prepared through solid-gas reactions of CdO with a sulfidizing gas mixture, at 750°C for 3 hr, and slow cooling under nitrogen atmosphere. The X-ray diffraction data of the product was indexed in a hexagonal system with unit cell parameters of a = 4.136 and c = 6.713Å, which agreed with the literature data. However, the presence of extra strong lines in the X-ray diffraction pattern and the splitting in the d-spacings showed that a new orthorhombic form of CdS was obtained. The unit cell dimensions were found to be a = 14.315, b = 14.074, and c = 14.568Å and the space group was found to be Pnnn. The IR absorption spectrum showed the formation of pure CdS. The X-ray powder pattern of this phase which was taken after 2 years showed only the presence of the hexagonal phase reported in the literature. This proved that the orthorhombic phase is metastable.

Citation Formats
M. Bi̇lgi̇n, M. Kızılyallı, and A. Usanmaz, “Synthesis of a new orthorhombic metastable form of CdS through solid-state reactions,” Journal of Solid State Chemistry, vol. 80, no. 1, pp. 75–79, 1989, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51726.