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Table 1 Elemental composition of talc and vermiculite

From: Synthesis of cyclic carbonates from epoxides and carbon dioxide catalyzed by talc and other phyllosilicates

Entry Element expressed as oxide Talc composition [wt.%] Vermiculite composition [wt.%]
1 SiO2 54.28 42.98
2 Al2O3 2.48 14.24
3 Fe2O3 6.07 7.13
4 MgO 29.35 21.35
5 CaO 1.22 2.06
6 MnO 0.26 0.18
7 K2O 0.12 0.92
8 Na2O 0.25 0.48
9 Cr2O3 0.08 0.04
Sum* 94.1 89.4
  1. *Sum excluding volatiles such as water.