Ba2Cu(HCOO)6, Thermal Behavior and Crystal Structure of the Room Temperature Phase

Monoclinic–orthorhombic phase transition in Ba2Cu(HCOO)6 crystals: a Raman scattering study

“…9,11 We took into account such pseudo-symmetries when we performed the assignment of the modes observed Figure 5. Projection on to the ac plane of (a) the monoclinic and (b) the orthorhombic phase of Ba 2 Cu(HCOO) 6 .…”

“…9 The barium atoms display an irregular ninefold coordination polyhedron and the copper atoms are surrounded by seven oxygen atoms, five of them defining an almost perfect square pyramid and the remaining two being located opposite to the apex. All the atoms occupy general sites with C 1 2 symmetry.…”

“…3,5 -9 For the compound Ba 2 Cu(HCOO) 6 , Vega et al 9 studied its crystalline structure at room temperature, and also some of its properties as a function of temperature, by using different techniques. The thermal behaviour of Ba 2 Cu(HCOO) 6 crystals was investigated by differential scanning calorimetry (DSC), optical microscopy and x-ray diffraction.…”

New double formates Na3M(HCOO)6 (M=Ga, In) with diamond-like metal framework: Synthesis, structure and coordination modes

“…One could also expect more diversified structure frameworks when the compounds contain different cations with different valence and/or coordination number. In fact, double formates, such as MM 0 (HCOO) 4 [27][28][29][30][31][32], M 2 M 0 (HCOO) 6 [27,30,[33][34][35], MM'(HCOO) 4 (H 2 O) 2 (M = Ca, Sr, and Ba, M 0 = Cu) [36], Ba 2 M(H-COO) 6 (H 2 O) 4 (M = Fe, Co, Ni, Cu, Zn) [37][38][39][40][41] and M x M 0 1Àx (HCOO) 2 Á2H 2 O (M = Mn, Co, Ni, Zn, Cd, Mg, and M 0 = Cu) [42][43][44][45][46], were known for many years. In the structure of SrCu(H-COO) 4 (H 2 O) 2 , for example, four different connection modes, 2.20, 2.11, 3.21 and 4.22 coexist.…”

Vibrational spectra of Ba2Cu(HCOO)6 crystals

“…Recently, Vega et al 6 reported the full thermal and x-ray structural characterization of barium copper formate [Ba 2 Cu(HCOO) 6 ] crystal. At room temperature, Ba 2 Cu(HCOO) 6 crystallizes in the monoclinic structure belonging to space group C 2 2 , with four molecules per unit cell.…”