c0s30°=a/2 a/2 ,m m 3723 a/2 m c-2 3八 c=1.633a Ideal lattice parameters in unit cell of HCP a should be:c/a 1.633 c/2 For Mg,Co,Ti,c/a is lower than the ideal value,indicating that the atoms is more e compactable with each other 1m= For other metals,c/a is greater than the ideal value PDF文件使用"pdfFactory Pro”试用版本创建www,fineprint.com.cn
a 3 a m = c/2 a a/2 c a a a c , 1.633 2 3 2 2 = - = Ideal lattice parameters in unit cell of HCP should be: c/a = 1.633 For Mg，Co，Ti, c/a is lower than the ideal value, indicating that the atoms is more compactable with each other For other metals, c/a is greater than the ideal value 3 / 2 3 / 2 , / 2 cos30 a a m m a = = = o m PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn
APF in HCP Bottom area= sin'sin asn60° a a a=2R PDF文件使用"pdfFactory Pro”试用版本创建iw.fineprint.com.cn
APF in HCP Bottom area= o o sin 60 3 sin 60 2 6 2 2 a a =÷ ÷ ø ö ç ç è æ a c a a×sin60° a R R a = 2R PDF 文件使用 "pdfFactory Pro" 试用版本创建 ÿwww.fineprint.com.cn
APF in HCP Bottom area =3a2 sin 60 a=2R volume (3a2sin60)c=(3a2sin60)1.633a AFP=Volume of atoms 6×4/3元R =0.74 Volume of unit cells [3(2R)2sin 601(1.633x2R) PDF文件使用"pdfFactory Pro'”试用版本创建wm,fineprint.com,cn
APF in HCP 0.74 [3(2 ) sin 60 ](1.633 2 ) 6 4 / 3 2 3 = ´ ´ = R R R o p Bottom area = o 3 sin 60 2 a volume = （3a2sin60°）c = (3a2sin60°)1.633a a c a = 2R AFP = Volume of atoms Volume of unit cells PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn
Radius Radius Metal Structure Metal Structure (nm) (nm) FCC 0.1431 Molybde Aluminum BCC 0.1363 num Copper FCC 0.1278 Tungsten BCC 0.1371 Gold FCC 0.1442 Iron (a) BCC 0.1241 Lead FCC 0.1750 Tantalu BCC 0.1430 m Nickel FCC 0.1246 Titanium HCP 0.1445 () Platinum FCC 0.1387 Cadmiu HCP 0.1490 m Silver FCC 0.1445 Zinc HCP 0.1332 Chromium BCC 0.1249 Cobalt HCP 0.1253 PDF文件使用"pdfFactory Pro”试用版本创建ww,fineprint..com,cn
Metal Structure Radius (nm) Metal Structure Radius (nm) Aluminum FCC 0.1431 Molybde num BCC 0.1363 Copper FCC 0.1278 Tungsten BCC 0.1371 Gold FCC 0.1442 Iron (a) BCC 0.1241 Lead FCC 0.1750 Tantalu m BCC 0.1430 Nickel FCC 0.1246 Titanium (a) HCP 0.1445 Platinum FCC 0.1387 Cadmiu m HCP 0.1490 Silver FCC 0.1445 Zinc HCP 0.1332 Chromium BCC 0.1249 Cobalt HCP 0.1253 PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn
2.Crystalline Structure of Carbon Diamond: 8 atoms in each unit cell 2 atoms in each subunit cell PDF文件使用"pdfFactory Pro'”试用版本创建wm,fineprint.com,cn
Diamond: 8 atoms in each unit cell 2 atoms in each subunit cell 2. Crystalline Structure of Carbon PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn