Molecular and Crystal Structure Characterization of Calcium-Deficient Apatite

Author(s):  
Hong Hui Zhou ◽  
Hui Li ◽  
Ling Hong Guo
2007 ◽  
Vol 330-332 ◽  
pp. 119-122 ◽  
Author(s):  
Hong Hui Zhou ◽  
Hui Li ◽  
Ling Hong Guo

Calcium-deficient hydroxylapatite (CDHA) powders with Ca/P ratios from1.5 to 1.67 were synthesized by wet-chemical method. Rietveld structure refinement was performed on the X-ray diffraction data and Fourier transform infrared spectroscopy was used to characterize molecular and crystal structure of CDHA. With the decrease of Ca/P ratio, the crystallite size and crystallinity decreased, but the acid phosphate content and amount of vacancies in hydroxyapatite hexagonal structure increased. The disorder of CDHA structure increase indicated calcium-deficiency and HPO4 replacement resulted in disorder of crystal in apatite structure. The more calcium is deficient, the more disorder or imperfect in CDHA structure


Polyhedron ◽  
2009 ◽  
Vol 28 (7) ◽  
pp. 1261-1264 ◽  
Author(s):  
Animesh Patra ◽  
Sandipan Sarkar ◽  
Michael G.B. Drew ◽  
Ennio Zangrando ◽  
Pabitra Chattopadhyay

ChemInform ◽  
2010 ◽  
Vol 41 (24) ◽  
pp. no-no
Author(s):  
Hui-Min Cheng ◽  
Dun-Ru Zhu ◽  
Wei Lu ◽  
Ren-Hui Xu ◽  
Xuan Shen

2014 ◽  
Vol 1004-1005 ◽  
pp. 542-545
Author(s):  
Ya Bing Liu ◽  
Li Guang Xiao

A new bi-capped Keggin heteropoly molybdovanadated derivative, [Co (en)3]2[SiMo8V6O42]∙6H2O (1) (en = ethylendiamine) has been hydrothermally synthesized and structurally characterized by the elemental analysis, IR, XPS and single crystal X-ray diffraction. The crystal structure analysis reveals that compound 1 consists of [Co (en)3]2+transition metal coordination fragment and the [SiMo8V6O42]4-building blocks, which are linked together via hydrogen-bonding interactions to form a new 3-D supramolecular networks.


2014 ◽  
Vol 215 ◽  
pp. 176-183 ◽  
Author(s):  
W. Assenmacher ◽  
G. Schnakenburg ◽  
Y. Michiue ◽  
Y. Kanke ◽  
N. Kimizuka ◽  
...  

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