1) Manganese mineral 2) Phosphate mineral 
Triploidite is an uncommon manganese iron phosphate mineral with formula: {chemical formula|(||Mn||,||Fe||)|2|PO4||OH}. It crystallizes in the monoclinic crystal system and typically occurs as elongated and striated slender prisms which may be columnar to fibrous. Its crystals may be pinkish to yellowish brown or red-orange. It was first described...
• (n.) A manganese phosphate near triplite, but containing hydroxyl instead of fluorine.
Triploidite is a manganese phosphate similar to triplite, but containing hydroxyl instead of fluorine.