A group of silicate minerals which have an Si:O ratio of 1:3, but have a slightly different structure. Both pyroxenes
and pyroxenoids contain octahedrally coordinated cations between SiO3 chains. In the pyroxenoids, however, the
chains are twisted.
| Mineral | Formula |
| pectolite | Ca2NaH(SiO3)3 |
| pyroxferoite | ? |
| rhodonite | MnSiO3 |
| wollastonite | CaSiO3 |
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