K2 (Cu (C O3)2)

C₂CuK₂O₆

Figgis, B.N.Reynolds, P.A.White, A.H.Geoffrey, A.W.

Journal of the Chemical Society. Dalton Transactions, Inorganic Chemistry (1972-) (1981) 1981, 371-376

a=11.425Å   b=17.658Å   c=6.154Å

α=90°   β=90°   γ=90°