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Published online by Cambridge University Press: 14 March 2018
The ejected blocks found in the 'peperino' of the Alban Hills have long attracted the attention of mineralogists on account of their variety in content of well-crystallized minerals. It may be recalled that this Roman region provides the earliest and finest examples of the white octahedral haiiyne, at first referred to a separate species (berzeline), and that this mineral with leueite, yellow garnet, wollastonite, green clino-pyroxene, and melilite form characteristic assemblages in the tufts from Albano, Frascati, and other places.
page 39 note 1. A systematic account of the 'enclaves de caleaires' of the Latium district is given in Laeroix, A., Enclaves des roehes volcaniques. Ann. Acad. Mâcon 1893, vol. 10, pp. 334–350 Google Scholar.
page 39 note 2. That this mineral is kaliophilite, not kalsilite, is demonstrated by both powder and single-crystal X-ray photographs. The anomalous properties which the mineral shows are at present under investigation by Dr. A. M. B. Douglas at Cambridge.