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http://hdl.handle.net/10773/19526| Title: | Synthesis and structure of new microporous Nd(III) silicates of the rhodesite group |
| Author: | Munha, Rui F. Ananias, Duarte Almeida Paz, Filipe A. Rocha, Joao |
| Keywords: | CRYSTAL-STRUCTURE HYDRODELHAYELITE DELHAYELITE FRAMEWORK |
| Issue Date: | 2015 |
| Publisher: | WALTER DE GRUYTER GMBH |
| Abstract: | The synthesis and structural characterization of two novel trivalent neodymium microporous silicates whose structures are reminiscent of the structure of mineral montregianite of the rhodesite group, and their infrared light-emission properties are reported. The compound KNa2Nd[Si8O19]center dot 5H(2)O (1) crystallizes in the orthorhombic Pmma space group: a = 23.9016(17) angstrom, b = 6.9980(5) angstrom, c = 6.5474(5) angstrom. Heating 1 at 200 degrees C for 40 min affords a new partially dehydrated phase, KNa2Nd[Si8O19]center dot 2.8H(2)O (2), also crystallizing in the orthorhombic Pmma space group: a = 23.923(4) angstrom, b = 6.9950(11) angstrom, c = 6.5474(10) angstrom. -Compound 2 is the hydrated phase with the lowest content of water molecule reported to date in the rhodesite mineral series. |
| Peer review: | yes |
| URI: | http://hdl.handle.net/10773/19526 |
| DOI: | 10.1515/zkri-2014-1811 |
| ISSN: | 2194-4946 |
| Publisher Version: | 10.1515/zkri-2014-1811 |
| Appears in Collections: | CICECO - Artigos |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Synthesis and structure of new microporous Nd(III) silicates of the rhodesite group_10.1515zkri-2014-1811.pdf | 1.26 MB | Adobe PDF |  |
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