YANG Jing, MA Hong-wen*, ZENG Cheng, LIU Chang-jiang, MA Xi, LUO Zheng, WANG Shi-jian

(School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China)

Abstract: Analcime and hydroxycancrinite were synthesized successfully by alkali-hydrothermal treatment of potassic syenite at 260 ℃ and 4 h. The two minerals analcime and hydroxycancrinite were formed by controlling the ratio of the syenite powder, NaOH and distilled water. The K2O and partial SiO2 of the syenite were dissolved into the solution during the synthesis. Zeolite formation of the three kinds of syenite by direct alkali-hydrothermal method is of importance to the potash salt preparation using insoluble potash resources while it is useful to interpret the mineralization mechanism of some metal ores, oil and gas formation, intergrowth and transformation of feldspars and zeolites, and natural zeolitization as well.

Keywords: potassic syenite; NaOH; hydrothermal treatment; analcime; hydroxycancrinite；mineralization；potash salt and fertilizer

Email: mahw@cugb.edu.cn

ACTA MINERALOGICA SINICA Vol. 36, No. 1, 2016, Page 38-42