A New Mineral, Dingdaohengite-(Ce): The Polymorph of Perrierite-(Ce) and a Titanic Analog at the c (1) Site of Chevkinite Sub-Group

详细信息   

• 责任者：Xu Jinsha (Chengdu Institute of Geology and Mineral Resources ; Chengdu 610082 ; China) ; Yang Guoming
• 刊名：Acta Mineralogica Sinica
• 出版年：2008
• 卷期：28(3)
• 关键词：硅钛铈铁矿 ; chevkinite
• 页码：p.237-243
• 图表：5 illus., 4 tables, 16 refs.[
• 分类号：0700
• issnNo：ISSN1000-4734
• isbnNo：CN52-1045/P

摘要

A New Mineral, Dingdaohengite is a new member of the chevkinite group minerals from the world-known Bayan Obo REE-Nb-Fe mine in China. The mineral occurs as euhedral or subhedral, short columnar or thick tabular// (001) crystals in the magnesian skarn rocks, located mainly in the exocontact between granite and dolomitic marble. Most individual crystals are 0.2 ~ 1.0 cm long, the largest one is > 1. 5 cm in size. Associated minerals are diopside, tremolite, richterite, allanite- (Ce), magnetite, ilmenite, spinel, titanite, pyrochlore, F-rich phlogopite, fluorapatite, quartz, fluorite, etc. The mineral is black with a brown streak and a submetallic-metallic luster, translucent in thin fragments being brownish-black in colour. It is brittle with conchoidal fractures.