Synthesis and structure of new microporous Nd(III) silicates of the rhodesite group
authors Munha, RF; Ananias, D; Paz, FAA; Rocha, J
nationality International
journal ZEITSCHRIFT FUR KRISTALLOGRAPHIE-CRYSTALLINE MATERIALS
author keywords crystal structures; microporous lanthanide silicates; montregianite; rhodesite
keywords CRYSTAL-STRUCTURE; HYDRODELHAYELITE; DELHAYELITE; FRAMEWORK
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.
publisher WALTER DE GRUYTER GMBH
issn 2194-4946
year published 2015
volume 230
issue 5
beginning page 353
ending page 362
digital object identifier (doi) 10.1515/zkri-2014-1811
web of science category Crystallography
subject category Crystallography
unique article identifier WOS:000353815900008
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