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Mg 2 Pb 2 Si 2 O 7 F 2 : a new lead-containing alkali earth metal silicate fluoride with a short cutoff edge
A new silicate fluoride, Mg 2 Pb 2 Si 2 O 7 F 2 , has been successfully synthesized using a high-temperature solution method. It crystallizes in the orthorhombic space group Pbcn (No. 60). Mg 2 Pb 2 Si 2 O 7 F 2 is the first lead-containing alkali earth metal silicate fluoride. The optical character...
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| Published in: | New journal of chemistry 2023-09, Vol.47 (37), p.17413-17419 |
|---|---|
| Main Authors: | , , , , , , |
| Format: | Article |
| Language: | English |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
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| Summary: | A new silicate fluoride, Mg
2
Pb
2
Si
2
O
7
F
2
, has been successfully synthesized using a high-temperature solution method. It crystallizes in the orthorhombic space group
Pbcn
(No. 60). Mg
2
Pb
2
Si
2
O
7
F
2
is the first lead-containing alkali earth metal silicate fluoride. The optical characterization indicates that Mg
2
Pb
2
Si
2
O
7
F
2
possesses a wide transparent window. To confirm the coordination environment of Si and its thermostability, infrared spectra and thermal behaviors were also analyzed. First-principles calculations were also implemented for a better understanding of the relationship between the structure of Mg
2
Pb
2
Si
2
O
7
F
2
and its properties. Additionally, to further explore the structural novelty of Mg
2
Pb
2
Si
2
O
7
F
2
, its structure is compared with anionic structures of silicate fluorides with alkali metals, alkaline earth metals or lone pair metal cations. Interestingly, the results indicate that the isolated [Si
2
O
7
] dimer is rare among the above systems, which enriches the structural chemistry of silicate fluorides. |
|---|---|
| ISSN: | 1144-0546 1369-9261 |
| DOI: | 10.1039/D3NJ03141A |