as a hydrothermally reworked product of eudialyte in nepheline syenites. Indeed, ashcroftine was found in vugs in augite-syenite at Narsarsuk, Greenland and for this reason the presence of yttria is not surprising. Finally, we have computed wt % for the proposed ashcroftine formula (table II) and th...
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| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.623.1921 http://www.minersoc.org/pages/Archive-MM/Volume_37/37-288-517.pdf |
| Summary: | as a hydrothermally reworked product of eudialyte in nepheline syenites. Indeed, ashcroftine was found in vugs in augite-syenite at Narsarsuk, Greenland and for this reason the presence of yttria is not surprising. Finally, we have computed wt % for the proposed ashcroftine formula (table II) and these values are in fair agreement with the Whitfield analysis. The Gladstone-Dale calculation in table II yielded d = (n--1)/k = 2"5I g/cm 3 which, with the earlier discussion, suggests that the observed specific gravity of 2.61 reported by Hey and Bannister is too high. We thank the American Chemical Society for assistance from the Petroleum |
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