
1) Manganese mineral 2) Phosphate mineral
Found on
https://www.crosswordclues.com/clue/triplite

Triplite is a rare phosphate mineral with formula: {chemical formula|(||Mn||,||Fe||)|2|PO4||(||F||,||OH||)}. It occurs in phosphate-rich granitic pegmatites typically as irregular brown opaque masses. Triplite was first described in 1813 for an occurrence in Chanteloube, Limousin, France. The name is from the Greek triplos for triple, in reference...
Found on
http://en.wikipedia.org/wiki/Triplite

• (n.) A mineral of a dark brown color, generally with a fibrous, massive structure. It is a fluophosphate of iron and manganese.
Found on
http://thinkexist.com/dictionary/meaning/triplite/

phosphate mineral, consisting of manganese, iron, magnesium, and calcium phosphate [(Mn, Fe, Mg, Ca)2PO4(F,OH)]. It occurs as brightly coloured ...
Found on
http://www.britannica.com/eb/a-z/t/81

Triplite is a mineral of a dark brown colour, generally with a fibrous, massive structure. It is a fluophosphate of iron and manganese.
Found on
http://www.probertencyclopaedia.com/browse/HT.HTM
No exact match found.