WAlstonite
WArgenta, Nevada
WBaryte
WBarytocalcite
WBenitoite
WBenstonite
WBergenite
WCelsian
WCymrite
WGuilleminite
WGurimite
WHarmotome
WHollandite
WHyalophane
WJinshajiangite
WKampfite
WKukharenkoite-(Ce)
WMacdonaldite
WMckelveyite-(Y)
WPabstite
WPsilomelane
WRomanèchite
WSanbornite
WTodorokite
WWilancookite
WWitherite