Does the majorite garnet $\ce{Mg3(FeSi)Si3O12}$ have a name?


Yes, it's called (unsuprisingly) majorite. This is an IMA-approved name, first described from a meteorite.

More information: https://www.mindat.org/min-2546.html

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  • $\begingroup$ But isn't majorite itself a solid solution? I don't see a name for the specific species that has no aluminum in it. $\endgroup$ – g.z. Mar 10 '19 at 22:01
  • $\begingroup$ @g.z. Minerals in general are solid solutions. Endmember chemucally pure minerals are extremely rare in nature. A mineral gets its own name when it’s dominated by a certain component (majorite in this case). This is as close as it gets. $\endgroup$ – Gimelist Mar 11 '19 at 1:26
  • $\begingroup$ @g.z. Just like you never see “forsterite” in nature. But if an olivine is sufficiently magnesian, we will call it forsterite even if there’s a bit of Fe and Ni in it. $\endgroup$ – Gimelist Mar 11 '19 at 1:27

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