On the existence of bivalent ions in the apatite channels: A new example—Phosphocalcium cyanamido-apatite
作者:J.C. Trombe、G. Montel
DOI:10.1016/0022-4596(81)90375-3
日期:1981.11
hydroxyapatite and calciumcyanamide. In this apatite, one CN2−2 ion associated with a vacancy replaces two hydroxyl ions in the channels. The formation of a cyanamide-containing apatite also occurs by treatment of an A-type carbonated apatite by ammonia at 600–900°C: in the latter case, the reaction seems more difficult and more limited than in the former. The cyanamido apatite is decomposed by heating in
Etude par RPE de l'Ion NO2−2 dans une apatite nitrée
作者:J. Dugas、B. Bejjaji、D. Sayah、J.C. Trombe
DOI:10.1016/0022-4596(78)90003-8
日期:1978.3
A calcium phosphate apatite which contains some different nitrogen oxides is studied by the ESR technique. NO2−2 ions are evidenced and characterized. They stay in the apatite channels with their OO direction along the channel axis. ESR experiments at different temperatures show that these ions rotate around this axis when the temperature becomes higher than that of liquid nitrogen.