Structure analysis of a Mn-doped willemite-type compound, H0.12(Zn1.89(3)Mn0.05(1)□0.06)Si1.00(1)O4

Behal, David; Röska, Benedikt; Gattermann, Ulf; Reul, A.; Park, So‐Hyun

doi:10.1016/j.jssc.2013.11.018

Cited by 9 publications

(2 citation statements)

References 17 publications

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“…Willemite belongs to orthosilicates, is trigonal, space group R3, the number of formula unit Z = 18 and lattice parameters refined as the standard [23] are a = 13.948(2) Å, c = 9.315(2) Å, Z = 18. In the references [24,25], the zinc positions are named the opposite of Klaska et al [23]. The Zn 1 tetrahedrons (orange) are smaller (<Zn 1 -O> = 1.9495 Å) than Zn 2 (grey) <Zn 2 -O> = 1.9613 Å. Zn 1 O 4 tetrahedrons form 6-membered rings with each other and also 4 ).…”

Section: Methodsmentioning

confidence: 99%

“…Klaska et al [23] measured unit cell parameters for hydrothermal synthesized α-Zn 2 SiO 4 to be a = 13.948(2) Å and c = 9.315(2) Å. The unit cell parameters of other synthesized willemite samples are similar: a = 13.9468(3) Å, c = 9.3177(1) Å [25]. For the willemite sample from the Franklin deposit, Simonov et al [31] have refined its structure and determined a = 13,971(3) Å, c = 9.334(1) Å; however, the content of the impurities was not specified.…”

Section: Xrd Diffraction Patternsmentioning

confidence: 96%

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Luminescence Properties of Tetrahedral Coordinated Mn2+; Genthelvite and Willemite Examples

et al. 2021

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The cause of the split of 4A4E(4G) Mn2+ excited level measured on minerals spectra is discussed. It is our view that ∆E = |4E(4G) − 4A(4G)| should be considered an important spectroscopic parameter. Among the possible reasons for the energy levels splitting taken under consideration, such as the covalent bond theory, the geometric deformation of the coordination polyhedron and the lattice site’s symmetry, the first one was found to be inappropriate. Two studied willemite samples showed that the impurities occur in one of the two available lattice sites differently in both crystals. Moreover, it was revealed that the calculated crystal field Dq parameter can indicate which of the two non-equivalent lattice sites positions in the willemite crystal structure was occupied by Mn2+. The above conclusions were confirmed by X-ray structure measurements. Significant differences were also noted in the Raman spectra of these willemites.

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