New Lu(III)-containing heteropoly salt with peacock–weakley type anion Na<sub>9</sub>[Lu(W<sub>5</sub>O<sub>18</sub>)<sub>2</sub>]·42H<sub>2</sub>O: synthesis and crystal structure
New neutral sodium salt with Peacock-Weakley type anion Na9[Lu(W5O18)2]·42H2O and Lu(III) as heteroatom was synthesized using procedure, elaborated in (Mariichak O.Yu., et al. Patent of Ukraine No. 121322, 2017). The crystalline compound was obtained from the aqueous solution acidified up to Z=0.80 (Z=ν(H+ )/ν(WO4 2- )) from Lu(NO3)3–Na2WO4–HNO3– H2O system.