Molybdenum Lanthanum Alloy Overview Molybdenum Lanthanum alloy, also known as high-temperature molybdenum, is graded MoLa, which is formed by doping a small amount of lanthanum trioxide (La2O3) particles in molybdenum to form a so-called laminated fiber structure. This special microstructure remains stable up to 2000 °C. Therefore, molybdenum-lanthanum has creep resistance even under extreme use