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The Collaborative International Dictionary
Ludlamite

Ludlamite \Lud"lam*ite\, n. [Named after Mr. Ludlam, of London.] (Min.) A mineral occurring in small, green, transparent, monoclinic crystals. It is a hydrous phosphate of iron.

Wiktionary
ludlamite

n. (context mineralogy English) A monoclinic-prismatic mineral containing hydrogen, iron, magnesium, manganese, oxygen, and phosphorus.

Wikipedia
Ludlamite

Ludlamite is a rare phosphate mineral with formula: (Fe,Mn,Mg)(PO)·4HO.

It was first described in 1877 for an occurrence in Wheal Jane mine in Cornwall, England and named for English mineralogist Henry Ludlam (1824–1880).