ˈtriˌplīt noun
( -s )
Etymology: German triplit, from tripl- + -it -ite; from its threefold cleavage
: a dark brown monoclinic basic phosphate of manganese, iron, magnesium, and calcium (Mn,Fe,Mg,Ca) 2 (PO 4 )(F,OH) generally with a fibrous massive structure