The 1T polytype of TaS 2 undergoes the transition from a normal metallic phase to an incommensurate CDW (IC-CDW) phase at 545 K, to a nearly commensurate CDW (NC-CDW) phase at 350 K and, finally, to a ...

The petroleum industry uses solids-free brines for completion and work over fluids. Operators must use brine densities sufficient to produce the required overbalance for well control, usually 200 psi ...