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2008北京奥运会与2008北京残奥会奖牌采用“金镶玉”奖牌。经过国家有关部门认定,金镶玉奖牌中用的玉为透闪石玉(昆仑玉)。闪石是指具有宝石价值的硅酸盐矿物。大多数的玉其化学成分都属于硅酸盐,为了研究方便,将它们的化学式用盐或氧化物的形式表示,据此,下列说法不正确的是 A.钙沸石Ca(Al2Si3O10)·3H2O可表示为:·Al2O3·3SiO2·3H2O B.正长石KAlSi3O8可表示为:K2O·Al2O3·O2 C.透闪石玉Ca2Mg5Si8O22(OH)2可表示为:2CaSiO3·5MgSiO3·H2O D.高岭石Al2(Si2O5)(OH)4可表示为:Al2O3·2SiO2·2H2O
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