WI-III-VI semiconductors
WBismuth telluride
WCopper indium gallium selenide
WCopper(I) oxide
WCopper(I) thiocyanate
WCopper(II) chloride
WCopper(II) oxide
WGallium(II) selenide
WGraphExeter
WIndium(III) oxide
WIron(II,III) oxide
WLead(II) iodide
WMercury(II) iodide
WMolybdenite
WMolybdenum disilicide
WMolybdenum disulfide
WPhosphorene
WPlatinum silicide
WPolyvinylcarbazole
WPyrite
WSilver telluride
WTin(IV) oxide
WUranium dioxide
WFile:Pyrite from Ampliación a Victoria Mine, Navajún, La Rioja, Spain 2.jpg