Syntheses and Structures of Two Ammonium Zinc Gallophosphates: Analcime and Paracelsian analogs

The rich crystal chemistry of theAMM′(PO4)2morphotropic series: NaZnAl(PO4)2, the first Na representative with a new structure type

“…As we mentioned above, (NH 4 )ZnGa(PO 4 ) 2 (Mrak et al, 2002;Logar et al, 2001) crystallizes in two modifications, namely the celsian or paracelsian (Chiari et al, 1985) structure types. The a and b unit-cell parameters of the paracelsian analogue with a primitive monoclinic lattice correspond to half diagonals of the (001) plane in the celsian phosphate equivalent with a C-centred Bravais cell (Table 4).…”

“…Moreover, the layers described are stacked in different ways along the c axis by a 90 rotation of the adjacent layer in the celsian structure type. According to Logar et al (2001), the large amount of incorporated Zn 2+ at Ga 3+ sites provides the high concentration of negative charge in the framework and the compound has a potential for ion-exchange capacity.…”

New Titanium and Nickel Gallophosphates with Layered Structures

“…The ratios of Ti/Ga/P determined from single-crystal structure refinements (2.5:5.5:10) can be compared well with EPMA data (2.4:5.1:10.0) measured from that particular crystal. Water oxygens O (21) and O (22) in TGP-1 and the hydroxo oxygen atoms O (15) and O( 16) and the water oxygen O (17) in NGP-1 were all identified from their unsaturated bondvalence sums. 26 The last cycles of refinement, based on F 2 , including atomic positions for all atoms, anisotropic thermal parameters for all non-hydrogen framework atoms, and isotropic thermal parameters for all the hydrogen atoms, converged at R1 ) 0.0399 for TGP-1 and R1 ) 0.0424 for NGP-1.…”

“…Besides isomorphous substitution, on the other hand, TM ions can often lead to the formation of new framework topologies. For example, by implanting vanadium, manganese, cobalt, copper, and zinc into GaPO lattices, novel structures had been generated. ,,− However, no report on Ti-, Cr-, and Ni-incorporated GaPOs have ever been documented. In our recent investigations on zeolitic organo-metallophosphates, we have not only incorporated Cr 3+ ions into the 24R-channel NTHU-1 but also successfully prepared a unique TiGaPO, (H 2 C 4 H 10 N 2 ) 3 [(Ti 2.5 (H 2 O) 4 Ga 5.5 (PO 4 ) 10 ]·2H 2 O (designated TGP-1 ), and a new NiGaPO, [H 3.5 (C 4 H 13 N 3 ) 2 ][(Ni 0.5 (OH) 4 Ga 5.5 (PO 4 ) 3 (HPO 4 ) 4 ]·2H 2 O (designated NGP-1 ).…”

Synthesis and crystal structure of NaCuIn(PO4)2

“…A recent survey given by Yakubovich et al (2019) revealed that all compounds of the morphotropic series AM II M 0III (PO 4 ) 2 , where A = Na, K, Rb or NH 4 , M 00 = Cu, Ni, Co, Fe, Zn or Mg and M 000 = Fe, Al or Ga, crystallize in the monoclinic crystal system and can be classified into seven subgroups according to their structure types, viz. (i) KNiFe(PO 4 ) 2 (space-group type P2 1 /c, Z = 4; Strutynska et al, 2014); (ii) KFe II Fe III (PO 4 ) 2 (space-group type P2 1 /c, Z = 4; Yakubovich et al, 1986); (iii) (NH 4 )Fe II-Fe III (PO 4 ) 2 (space-group type C2/c, Z =16; Boudin & Lii, 1998); (iv) K(Co,Al) 2 (PO 4 ) 2 (space-group type C2/c, Z = 8; Chen et al, 1997); (v) (NH 4 )(Zn,Ga) 2 (PO 4 ) 2 (space-group type P2 1 /a, Z = 4; Logar et al, 2001); (vi) KMgFe(PO 4 ) 2 (space-group type C2/c, Z = 4; Badri et al, 2009); (vii) NaZnAl(PO 4 ) 2 (space-group type P2 1 /c, Z = 4; Yakubovich et al, 2019). NaCuIn(PO 4 ) 2 belongs to the second subgroup of this classification.…”