Calculate the fraction of lattice sites that are Schottky defects for cesium chloride at 619 oC (this temperature is below the melting temperature (645oC)). Assume an energy for defect formation of 1.86 eV.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering