This chemical is called Carbonic acid, lutetium(3+) salt (3:2), and it's also named as Dilutetium tricarbonate. With the molecular formula of C₃Lu₂O₉, its molecular weight is 529.96. The CAS registry number of this chemical is 5895-53-4.  

Other characteristics of the Carbonic acid, lutetium(3+) salt (3:2) can be summarised as followings: (1)ACD/LogP: -0.81; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -1.98; (4)ACD/LogD (pH 7.4): -3.77; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 3; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 57.53 Å²; (13)Flash Point: 169.8 °C; (14)Enthalpy of Vaporization: 63.37 kJ/mol; (15)Boiling Point: 333.6 °C at 760 mmHg; (16)Vapour Pressure: 2.58E-05 mmHg at 25°C.

You can still convert the following datas into molecular structure: 
1.SMILES: [Lu+3].[Lu+3].O=C([O-])[O-].[O-]C([O-])=O.[O-]C([O-])=O
2.InChI: InChI=1/3CH2O3.2Lu/c3*2-1(3)4;;/h3*(H2,2,3,4);;/q;;;2*+3/p-6
3.InChIKey: UMTLFFUVLKOSNA-CYFPFDDLAO