紫(zi)(zi)銅(tong)(tong)又名紅銅(tong)(tong)就是(shi)銅(tong)(tong)單質(zhi)，因其顏色為紫(zi)(zi)紅色而(er)得名。各種(zhong)性質(zhi)見銅(tong)(tong)。紫(zi)(zi)銅(tong)(tong)是(shi)工業(ye)純銅(tong)(tong)，其熔點為1083℃，無同(tong)素異構轉變，相對密度為8.9，為鎂(mei)的五倍。同(tong)體(ti)積(ji)的質(zhi)量比普通鋼重約(yue)15%。因其具(ju)有玫瑰紅色，表面(mian)形成氧化膜后(hou)呈紫(zi)(zi)色，故(gu)一般稱為紫(zi)(zi)銅(tong)(tong)。它是(shi)含有一定氧的銅(tong)(tong)，因而(er)又稱含氧銅(tong)(tong)。