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某离子晶体晶胞结构如下图所示,x位于立方体的顶点,
Y位于立方体中心。试分析: (1)晶体中每个Y同时吸引着__________个X,每个x同时吸引着__________个Y,该晶体的化学式为__________ 。 (2)晶体中在每个X周围与它最接近且距离相等的X共有 __________个。 (3)晶体中距离最近的2个X与1个Y形成的夹角∠XYX的度数为__________。
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAA5ElEQVRYR2NkGGDAOMD2M+B0wKpVq9huv/jbxPD/fxwDA4MkhQ59zsDIuEhVgrkuLCzsF7JZOB3QOml5B8P//+UUWoyqnZGxszovsoI4B0xc9gyfzxmZmb2rcsK3IRvWMWm599///7fgcfTz6vwoKWId8B+f75kZGX0q8iK3kugAhur8KJRQxx0FE5fhdQC5UTPqgNEQGA2B0RAYDYHREBgNgaETAuTW96TqG7yt4tbRFhGRIQBqHTP9+8dIoDUMTxqk5AK8zXKYiaDWMYhNpANIaJYPdMdkwLtmpOZnctUPeDkAAP6tmiH1ggTLAAAAAElFTkSuQmCC)
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