High pressure X-ray diffraction study on the structural phase transition in MnS2

✍ Scribed by T. Chattopadhyay; H.G. von Schnering; W.A. Grosshans

• Publisher: Elsevier Science
• Year: 1986
• Weight: 241 KB
• Volume: 139-140
• Category: Article
• ISSN: 0378-4363
• DOI: 10.1016/0378-4363(86)90583-8

✦ Synopsis

High pressure X-ray diffraction experiments have been performed on MnS, with both conventional X-ray source and synchrotron radiation.

MnS, undergoes a pressure-induced first-order structural phase transition from the cubic pyrite-type to the orthorhombic marcasite-type phase at about 140 kbar with about 15% volume contraction.

Mn" in the pyrite-type MnSz is in the high-spin state. The 15% volume contraction and the compressibilities of the two phases suggest a high-spin+ low-spin transition of Mn*' accompanying the structural phase transition.