Investigation of Structural Phase Transition of PbS

Table 3

Calculated values of elastic constants (in GPa) and pressure derivative of bulk modulus and Cauchy discrepancy (𝛿) of lead sulphide.

Solid	Present	Experimental	Others
𝐶11	131.62	124.0^a	135.1^b
𝐶12	30.45	33.0^a	16.9^b
𝐶44	19.86	23.0^a	20.4^b
𝑑𝐵𝑇/𝑑𝑃	3.2	—	3.8^c
𝛿	10.59	10	−3.5
𝑆	50.58	—	—

^areference [7], ^breference [10], ^cReference [11].