Physical properties and crystal structure of near end-member oxy-dravite from the Beluga occurence, Nunavut territory, Canada
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| Year of publication | 2023 |
| Type | Conference abstract |
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| Description | A new occurrence of oxy-dravite was found in a composition near its ideal end-member at the Beluga occurrence, Nunavut territory, Canada. Oxy-dravite belongs to the sodic group of the tourmaline supergroup with dominant WO, and commonly forms a solid solution with foitite, schorl, and oxy-schorl. Since its original description (Bosi & Skogby 2013) from the quartz-muscovite schist from Osarara (Narok district, Kenya), the mineral has been found at several localities worldwide, typically in metamorphic environments, and typically in solid solution with other species (Čopjaková et al. 2012; Cempírek et al. 2013; Pieczka et al. 2018). The contribution provides new information about the occurrence, chemical composition, physical and structural properties of the oxy-dravite with a near-endmember composition from the Beluga occurrence. These data improve characterization of physical properties of oxy-dravite, allow examination of oxy-dravite solid solutions with respect to other species, improve the interpretation of Al–Mg disorder among the Y- and Z-sites, and discuss its petrogenetic importance. |
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