Lawrencium: the essentials
Lawrencium is a synthetic "rare earth metal" which does not occur in the environment.
Lawrencium: historical information
Element 103, lawrencium, was discovered in 1961 by Ghiorso and others in Berkeley, California, USA, who bombarded a californium target with boron ions. They obtained perhaps two micrograms. Several lawrencium isotopes including those with masses 253, 254, 255, 256, 257, 258, 259, and 260 are known now.
Lawrencium: physical properties
Lawrencium: orbital properties
Isolation: coming soon!