11. Lanthanum is the least volatile of the lanthanides.12. Indeed, lanthanum is a strongly electropositive metal, comparable to calcium in electropositivity. 13. Like most of the lanthanides, lanthanum has a hexagonal crystal structure at room temperature. 14. Lanthanum is not essential for humans and has a low to moderate level of toxicity.15. Lanthanum was also first discovered in minerals from Bastn�s in 1839 by Carl Gustav Mosander.16. Initially, a phosphate process was used, where lanthanum was precipitated as lanthanum phosphate. 17. Initially, a phosphate process was used, where lanthanum was precipitated as lanthanum phosphate. 18. Bonding is ionic with lanthanum highly coordinated. 19. Looking for a diagram that shows the local coordination environment in the lanthanum trifluoride structure. 20. They are termed lanthanides because the lighter elements in the series are chemically similar to lanthanum .
