Chemical Studies of Minerals Containing Rarer Elements from the Far East District. LXV. Pollucite from Nagatare, Fukuoka Prefecture, Japan
- 1 March 1972
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 45 (3) , 812-813
- https://doi.org/10.1246/bcsj.45.812
Abstract
The chemical analysis of pollucite found in a granite pegmatite at Nagatare, Fukuoka Prefecture, gave SiO2 46.03, Al2O3 17.76, Fe2O3 0.02, MnO 0.01, CaO 0.03, Li2O 0.16, Na2O 2.08, K2O 1.81, Rb2O 0.61, Cs2O 28.88, and H2O 2.74; total 100.13%; recalculated as (Cs,Rb)0.573(Na,K,Li,Mn,Ca)0.316(Al,Fe)0.943Si2.071O6·0.411 H2O as O=6, thus satisfying the crystallochemical formula advocated by Beger. X-ray single crystal and powder studies have shown it to be cubic, the space group is Ia3d; a0=13.674±0.005 Å. It is optically isotropic or very faintly birefringent, with n=1.520±0.002.Keywords
This publication has 2 references indexed in Scilit:
- The crystal structure and chemical composition of polluciteZeitschrift für Kristallographie, 1969
- On Amblygonite from Nagatare-yama, Fukuoka Prefecture.Journal of the Mineralogical Society of Japan, 1955