Materials Matter! (MM!)

Example notations that qualify as material formulae:

`TiO2`	titanium dioxide (`TiO₂`)
`{*TiO2}{np}`	titanium dioxide (`TiO₂`) nanoparticle
`{*TiO2}{npphn=anatase}`	titanium dioxide (`TiO₂`) nanoparticle with anatase-phase structure
`{*Mn5Ge3}{efsrf=Ge(111)}`	epitaxial `Mn₅Ge₃` film on `Ge(111)` substrate
`{*ZnO}{nr}{IMa=Ni}`	Ni-doped zinc oxide (`Ni:ZnO`) nanorods
`{*BaTiO3}{np}{dpc=O}`	`BaTiO₃` nanoparticle(s) dispersed in water
`[27Al]`	`²⁷Al`, isotopically labelled aluminum
`[C]{alall=graphene}`	carbon atomic-layer allotrope: graphene