1971
DOI: 10.1107/s0567740871002759
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The crystal structure of zinc diborate ZnB4O7

Abstract: Zinc diborate crystallizes in the orth0rhombic system, space group Pbca, with eight formula units in a cell of dimensions a= 13"714_+0"005, b=8"091 _+0.005 and c=8.631 _+0.005 A. The calculated density is 3"07 g.cm-3, and all atoms are in general positions. The structure of ZnB407 has been solved by three-dimensional Fourier syntheses. The positional and isotropic thermal parameters were refined by the least-squares method based on 530 observed reflexions. The final conventional R index is 0.067. The structure… Show more

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Cited by 59 publications
(43 citation statements)
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“…Its lattice parameters are a = 7.478Å, which is in accordance with Bondaryeva's report [23]. Compound ␣-ZnB 4 O 7 is orthorhombic system with space group Pbca, its lattice parameters are a = 13.71Å, b = 8.091Å, c = 8.631Å, which is in agreement with Martinez-Ripoll et al [24].…”
Section: Zno-moo 3 Systemsupporting
confidence: 90%
“…Its lattice parameters are a = 7.478Å, which is in accordance with Bondaryeva's report [23]. Compound ␣-ZnB 4 O 7 is orthorhombic system with space group Pbca, its lattice parameters are a = 13.71Å, b = 8.091Å, c = 8.631Å, which is in agreement with Martinez-Ripoll et al [24].…”
Section: Zno-moo 3 Systemsupporting
confidence: 90%
“…The melting point of ZnO·B 2 O 3 is 982 • C and 5ZnO·2B 2 O 3 melts incongruently at 1045 • C [5]. However, six other compounds were reported with the ZnO:B 2 O 3 molar ratios of 4:1 [6], 3:1 [7-9], 4:3 [10][11][12], 1:1 [13], 1:2 [14,15] and 1:3 [16]. The 4:1 compound was obtained by hydrothermal method.…”
Section: Zno-b 2 O 3 Systemmentioning
confidence: 99%
“…The 4:3 compound belongs to the cubic system with space group I43m and a ≈ 7.48Å [10][11][12]. Martinez-Ripoll et al [14] reported that the 1:2 compound crystallized in the orthorhombic symmetry with the space group Pbca and lattice parameters a = 13.714(5), b = 8.091(5), c = 8.631(5)Å. Huppertz and Heymann [15] obtained an orthorhombic 1:2 compound under high pressure with space group Cmcm and lattice parameters a = 10.850(1), b = 6.489(1), c = 5.173(1)Å. Toropov and Konovalov [16] reported that the 1:3 compound decomposed at 900 • C, but no structural data were reported.…”
Section: Zno-b 2 O 3 Systemmentioning
confidence: 99%
“…Zinccontaining borates have been studied due to their potential value as catalysis and optical materials [2,3]. In the binary system of ZnO-B 2 O 3 , at least three compounds have been proposed including ZnB 4 O 7 [4], Zn 3 B 2 O 6 [5], and Zn 4 O(BO 2 ) 6 [6]. The crystal structure of Zn 3 B 2 O 6 (which we call the hightemperature ␤-form of Zn 3 B 2 O 6 here) was first determined by Garcia-blanco and Fayos to be in a noncentrosymmetric group Ic [5], subsequently corrected by Baur and Tillmanns in a centrosymmetric group I2/c [7], and recently further refined by Chen et al in a standard group C2/c [8].…”
Section: Introductionmentioning
confidence: 99%