The fractional crystallization purification of lanthanum as the double ammonium nitrate was sufficiently rapid and efficient, that lanthanum purified in this manner was not expensive.
en.wikipedia.org The existence of divalent berkelium salts is uncertain and has only been reported in mixed lanthanum chloride-strontium chloride melts.
en.wikipedia.org Three group 3 elements occur naturally, scandium, yttrium, and either lanthanum or lutetium.
en.wikipedia.org In the lithium niobate is a trigonally distorted perovskite-like structure, whereas the lanthanum niobate contains lone ions.
en.wikipedia.org For example, (protactinium), (beryllium), (chromium), and (lanthanum) are obscure characters meaning raw iron, needle, hook, and harrow respectively.
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