ANALYSIS OF CRYSTAL STRUCTURE OF FLUORO-APATITE BY MEANS OF NUCLEAR MAGNETIC RESONANCE (in Japanese)
The structure of fluoro-apatite was investigated by the NMR technique. Two sample specimens used were the single crystals from Japan and Mexico. The resonance curves were recorded for F/sup 19/ and P/sup 31/, respectively, by the autodyne type detector. The magnetic field was about 3900 gauss, and resonance frequencies were about 15.9 Mc for F/sup 19/ and about 6.8 Mc for P/sup 31/. The second moments were 0.68 and 0.44 gauss for F/sup 19/ and P/sup 31/. The second moments were also calculated theoretically by using the x-ray data with the results of 0.54 gauss and 0.15 gauss for F/sup 19/ and 0.68 and 0.44 gauss for F/sup 19/ and P/sup 31/. The second moments were also calculated theoretically by using the x-ray data with the results of 0.54 gauss and 0.15 gauss for F/sup 19/ and pat. In order to explain the discrepancies between the theoretical and experimental walues of second moments, the second moment values were calculated for the models where the coordinates of phosphorus atoms were varied, and it was confirmed that the second moment value for a model is consistent with the experimental value where the coordinates for P/sup 31/ are reduced by about 20% with respect to the x-ray data. Thus the coordinates for the fluoroapatite are: F:0,0,1/4; 0,0,3/4 and P: (x,y,l/4; y,x-y,1/4; y-x,x,1/4), x = 0.333, y = 0.289. (auth)
- Research Organization:
- Univ. of Electro=Communications, Tokyo
- NSA Number:
- NSA-15-011343
- OSTI ID:
- 4081322
- Journal Information:
- Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi, Journal Name: Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi Vol. Vol: 81; ISSN NPKZA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
Similar Records
SYNCHRONIZED AUTODYNE DETECTOR IN STUDIES OF NUCLEAR MAGNETIC RESONANCE SPECTRA
Polarized neutron scattering study of the multiple order parameter system [Polarized neutron scattering study on multiple order parameter system ]