Synthesis, structure and properties of Pb2CuB2O6

Abstract

Single crystals of Pb 2 CuB 2 O 6 were grown from a PbO/CuO/B 2 O 3 flux, and crystallize in a monoclinic cell of dimensions a = 5.6311(6), b = 8.7628(9), c = 6.2025(6) Å , and b = 115.7060(10)8 with Z = 2; the space group is P2 1 /c (no. 14). The structure was determined from 662 unique reflections and refined to the final residuals R 1 = 0.0217, wR 2 = 0.0586. The structure is characterized by the two-dimensional layer of interconnected rectangular planar CuO 4 and triangular planar BO 3 groups. The results of quantitative analysis ICP, DTA, vibrational spectroscopy, and magnetic investigations are also presented. #

Synthesis, crystal structure and optical properties of a novel sodium lead pentaborate, NaPbB5O9

“…The average distance of Pb-O is 2.643Å, which agrees well with those reported for the Pb 2 + of the range 2.395(5)-2.894(4)Å (average 2.629Å) in Pb 2 CuB 2 O 6 [28], and 2.364(6)-2.800(7)Å (average 2.476) in Pb 2 Cu 3 B 4 O 11 [29]. The calculated BVS value of 2.033 for Pb 2 + also verifies the coordination scheme.…”

Synthesis, Crystal Structure, and Properties of Bi3TeBO9 or Bi3(TeO6)(BO3): A Non‐Centrosymmetric Borate–Tellurate(VI) of Bismuth

“…The strong IR‐modes at 1248 and 1282 cm −1 are easily assigned to the antisymmetric ν 3as mode of the BO 3 unit with splitting as a result of the 10 B/ 11 B isotopic ratio. Similar IR modes were observed in other compounds containing isolated trigonal‐planar BO 3 units (for example: CaSn(BO 3 ) 2 or Pb 2 Cu(BO 3 ) 2 ) The modes between 500 and 700 cm −1 are mainly due to the TeO 6 octahedron. Similar spectra are observed in compounds A 2 M TeO 6 ( A =Li, Na; M =Ti, Ge, Sn), which represent ordered variants of the ilmenite type.…”

Synthesis, structure, and properties of Li2Pb2CuB4O10 with isolated [CuB4O10]6− units

“…The two Pb atoms and the two shared oxygens are also positioned in the [23], and in Pb 2 Cu 3 B 4 O 11 [24]. Likewise, the average Cu(1)-O distance for the square planar polyhedron in Li 2 Pb 2 CuB 4 O 10 is 1.937(7)Å as compared to 1.932Å in Pb 2 CuB 2 O 6 , and CuSe 2 O 5 [25,26] For further clarification, the bond valence sums of each atom in Li 2 Pb 2 CuB 4 O 10 were calculated [31,32] and are listed in Table 4. These valence sums agree with the expected oxidation states.…”