Growth of strontium chlorapatite crystals from a sodium chloride flux

Citation
S. Oishi et al., Growth of strontium chlorapatite crystals from a sodium chloride flux, B CHEM S J, 74(9), 2001, pp. 1635-1639
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry
Journal title
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
ISSN journal
0009-2673 → ACNP
Volume
74
Issue
9
Year of publication
2001
Pages
1635 - 1639
Database
ISI
SICI code
0009-2673(200109)74:9<1635:GOSCCF>2.0.ZU;2-K
Abstract
Large and well-formed crystals of strontium chlorapatite [Sr5Cl(PO4)(3)] we re grown for the first time from a sodium chloride flux. The obtained cryst als were colorless and transparent. The crystal growth of Sr5Cl(PO4)(3) was conducted by heating a mixture of solute and flux at 1100 degreesC for 10 h, and then cooling to 500 degreesC at a rate of 5 degreesC h(-1). Hexagona l prismatic crystals with lengths of up to 8.6 mm and widths of 2.1 mm were grown from high-temperature solutions containing 0.05-0.9 mol% solute. The most suitable solute content for the growth of prismatic crystals was 0.2 mol%. The prismatic crystals were bounded by the {10 (1) over cap0} and {10 (1) over cap1} faces. The aspect ratios were in the region of 1.1 to 4.2. Hexagonal needle crystals with lengths of up to 2.6 mm and widths of 60 mum were obtained during every growth run. The needle crystals were elongated in the < 0001 > directions, with aspect ratios ranging from 33 to 66. The m ajor constituents were almost homogeneously distributed in the prismatic an d needle crystals. The solubility Of Sr5Cl(PO4)(3) crystals in NaCl flux in creased with increasing temperature, reaching about 0.25 mol% solubility at 1100 degreesC.