9-14，用粉末法可测定KBr、LiBr、KF、LiF 均属NaCl 型结构，晶胞参数 .PDF

9-14锛岀敤绮夋湯娉曞彲娴嬪畾KBr 銆丩iBr 銆並F銆丩iF 鍧囧睘NaCl 鍨嬬粨鏋勶紝鏅惰優鍙傛暟鍒嗗埆涓?58pm锛 - + - + 550pm锛?34pm锛?02pm锛岃瘯鐢辫繖浜涙暟鎹帹鍑築r 锛孠 锛孎 锛孡i 鐨勭瀛愬崐寰勩€ - + 瑙ｏ細鍥燣i+ 鐨勫崐寰勬渶灏忥紝鏁匧iBr 鏅朵綋涓瑽r 鍙栫珛鏂规渶瀵嗗爢绉紝涓旈槾绂诲瓙闂村彲鐩存帴鎺ヨЕ锛孡i 鍦ㄥ叓闈綋绌洪殭涓紝鍒欐湁 4肀咅€€淀睙 = 鈭?肀庬翱饊仏饊€淀睙 飪 肀咅€€淀睙 = 194.5肀濏睔 + KBr 鍜孠F 涓槾绂诲瓙鍙栫珛鏂瑰瘑鍫嗙Н锛屼絾鍥燢 鐨勭瀛愬崐寰勮緝澶э紝闃寸瀛愰棿涓嶈兘绱у瘑鎺ヨЕ锛 闃撮槼绂诲瓙闂寸揣瀵嗘帴瑙︼紝鍒欐湁锛 肀咅€€淀睙 + 肀呿熬 飩豁睅戆攫€€淀睙 /2 = 329肀濏睔 飪 肀呿熬 飩?34.5肀濏睔 肀呿熬 + 肀咅€€ 飩豁睅戆攫€€ = 267pm 飪 肀咅€€ 飩?32.5肀濏睔 + LiF 涓紝闃寸瀛愬彇绔嬫柟瀵嗗爢绉紝闃崇瀛愬～鍏呭湪鍏潰浣撶┖绌达紝 Li 绂诲瓙鍗婂緞搴斿ぇ浜庢垨绛変簬闃 绂诲瓙鏈€瀵嗗爢绉殑绌虹┐鍗婂緞锛屽洜鑰屾湁锛 肀匧i + 肀咅€€ 鈮 肀庬翱饊仏饊€ /2 飪 肀匧i 鈮 68.5pm 9-17锛屾煇涓笁鍏冩櫠浣撳睘绔嬫柟鏅剁郴锛屾櫠鑳為《鐐逛綅缃负A 鍏冪礌鍗犳嵁锛屾１蹇冧綅缃负B 鍏冪礌鍗犳嵁锛 浣撳績浣嶇疆涓篊 鍏冪礌鍗犳嵁锛 锛?锛夊啓鍑烘鏅朵綋鐨勫寲瀛︾粍鎴愶紱 锛? 锛夊啓鍑烘櫠鑳炰腑鍘熷瓙鍒嗘暟鍧愭爣锛 锛? 锛堿 鍘熷瓙涓嶤 鍘熷瓙鍛ㄥ洿鍚勬湁鍑犱釜B 鍘熷瓙閰嶄綅銆 瑙ｏ紙1锛夎鏅朵綋鍖栧閰嶆瘮涓 AB C 3 锛? 锛夋櫠鑳炰腑鍘熷瓙鍒嗘暟鍧愭爣涓国 A 锛?,0,0 锛夛紱B(0,0,1/2锛?,1/2,0 锛 1/2,0,0); C(1/2,1/2,1/2) 锛? 锛堿 鍘熷瓙鍛ㄥ洿鏈? 涓狟 鍘熷瓙閰嶄綅锛孋 鍛ㄥ洿鏈?2 涓狟 鍘熷瓙閰嶄綅銆 9-28 姗勬鐭筹紙Mg SiO 锛夋櫠浣撳睘姝ｄ氦鏅剁郴锛孫2-浣滃亣鍏柟鍫嗙Н锛孲i4+浣嶄簬鍥涢潰浣撶┖闅欙紝Mg2+ 2 4 浣嶄簬鍏潰浣撶┖闅欙紝 锛?锛夎瘯鐢诲嚭鏅惰優鍥 锛? 锛夌敤 Pauling 瑙勫垯璇存槑鏄疭iO44-鏄崟鐙瓨鍦ㄣ€ 瑙ｏ細 (1) 渚濇彁璁煡鏅朵綋涓悇鍘熷瓙鐨勯厤浣嶆儏鍐靛涓嬶細姣忎釜Mg2+ 鍜屽叚涓狾2-閰嶄綅, 姣忎釜Si4+鍜 鍥涗釜O2-閰嶄綅锛屾瘡涓狾2-鍜屼笁涓狹g2+鍙婁竴涓 Si4+閰嶄綅锛 鍙圤2-浣滃亣鍏柟鍫嗙Н銆傚垯鍙帹娴嬫櫠鑳 鍥惧涓嬪浘鎵€绀 锛坔ttp:///jpowd/JPX/jpowd.php?target_file=Forsterite.jpx 锛 銆 (2) 鐢变笂杩伴厤浣嶆儏鍐靛彲鐭ワ紝鏅朵綋涓瘡涓狾2-鍜屼笁涓狹g2+鍙婁竴涓 Si4+閰嶄綅锛屽洜姝ゆ牴鎹數浠 瑙勫垯, 姣忎釜O-Mg 閿殑鐢典环涓 1/3, 姣忎釜O-Si 閿殑鐢典环涓 1, 杩涜€屽彲鎺ㄥ緱 SiO44- 涓璒2- 鐨勯潤鐢 閿€诲拰褰撲负锛 2 4 肀 鈭 = 鈭 肀嗮€仏 = 3肀 (饊亗 鈭 饊亐饊仈) + 肀 (饊亗 鈭 肀嗮€仏) = 3 脳 + = 2 6 4 饊仏 涓嶰 鐨勫父瑙勫寲鍚堜环鐩哥瓑锛屽洜姝わ紝鏅朵綋涓璖iO44-鍙互绋冲畾瀛樺湪銆 9-32 鑱旇嫰灞炲崟鏂滄櫠绯伙紝鏅惰優鍙傛暟涓 a