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Framework Type FRA
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| Type Material | ||||
| Material Name: | Franzinite | |||
| Chemical Formula: | |(Na,K)+30 Ca2+10 (SO4)2-10 (H2O)2| [Al30Si30 O120]-FRA | |||
| Unit Cell: | ||||
| trigonal | P321 (# 150) | |||
| a = 12.916Å | b = 12.916Å | c = 26.543Å | ||
| α = 90.0 ° | β = 90.0 ° | γ = 120.0 ° | ||
| Framework density: | 15.6 T/1000 Å3 | |||
| Channels: | apertures formed by 6-rings only (0-dimensional) | ||
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| References: | ||
| Ballirano, P., Bonaccorsi, E., Maras, A. and Merlino, S."The crystal structure of franzinite, the ten-layer mineral of the cancrinite group",
Can. Mineral., 38, 657-668 (2000) Ballirano, P. and Maras, A."Improved powder X-ray data for cancrinites IV: Franzinite", Powder Diffraction, 16, 216-219 (2001) |
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