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1971年在瑞士伯尔尼省格林木塞区的一个电缆坑道里发现。物理性质呈贝壳状集合体。由柱面 m(1010)、底面 c(0001)和锥面 x(1011)组成六方晶形(图17)。矿物颗粒大多数小于0.05mm,极少为0.05-0.1mm。粗略的晶体
Found in 1971 in a cable tunnel in the Greenmount district of Bern, Switzerland. Physical properties of a shell-like assembly. The hexagonal shape is composed of cylinder m (1010), base c (0001) and cone x (1011) (Figure 17). Most of the mineral particles are less than 0.05 mm and rarely 0.05-0.1 mm. Rough crystals