decaphosphate

noun2

1. •
   A substance containing ten phosphate groups [(PO₄)₁₀] or [P₁₀O₄₀].
2. •
   A polyphosphate or oligophosphate containing a condensed chain of ten phosphate groups

   • the believed they had obtained in a crystalline form the compounds which we now know as ... decaphosphate, Na₁₂P₁₀O₃₁ — 1962