[{"from": "human", "value": "Tell me the gravimetric heat capacity at 300 K of given MOF with MOF structural features and topology and composition. ->  MOF structural features and topology: linker [O-]C(=O)c1cnccn1, nodes [Ni], [O], [V], [V][V], topology \n composition: V12 Ni8 H24 C40 N16 O46\n"}, {"from": "gpt", "value": " 0.756509048\n"}]