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Figure 1
Backscattered electron microscopy image of natrocarbonatite sample. Light-grey prismatic phenocrysts – nyerereite (one of the grains marked N), dark-grey rounded phenocrysts – gregoryite (one of the grains marked G). |
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Figure 1
Backscattered electron microscopy image of natrocarbonatite sample. Light-grey prismatic phenocrysts – nyerereite (one of the grains marked N), dark-grey rounded phenocrysts – gregoryite (one of the grains marked G). |