Parameter Parameter d Nickel 2*theta d For Cobalt 2*theta 100] 110] 21.8252 4.06
ID: 895741 • Letter: P
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Parameter Parameter d Nickel 2*theta d For Cobalt 2*theta 100] 110] 21.8252 4.067373 4.067372971 31.0561 2.876246 4.067625496 38.2844 2.348178 4.067163849 44.5178 2.032776 4.065551678 50.1253 1.817714 4.064531919 55.2841 1.659675 4.065356448 64.7878 1.437273 4.065220977 22.068 4.023168 4.023168 31.411 2.844552 4.022805 38.729 2.322238 4.022235 45.093 2.008173 4.016346 50.711 1.798085 4.02064 55.977 1.640761 4.019028 65.611 1.421218 4.019811 70.12 1.34045 4.02135 74.632 1.270186 4.01668 83.131 1.160555 4.02028 91.656 1.073543 4.01683 [200] [210] [211) [220] Average Std Dev 0.001235737 4.06611762 Manganese 2*theta d 21.141 4.197438 4.197437878 30.1 2.9653954.193701674 37.104 2.420126 4.191781927 43.116 2.095564 4.191127474 48.529 1.873709 4.189741077 53.502 1.710678 4.19028733 62.641 1.481268 4.18965947 66.918 1.396597 4.189791171 71.075 1.324764 4.189271116 75.148 1.262739 4.188031348 79.09 1.209391 4.189453491 82.97 1.162398 4.191084101 86.911 1.119526 4.188883291 94.668 1.047168 4.188670254 98.541 1.016101 4.189492827 Average 4.019925 Std Dev 0.002461 Copper 2*theta d 21.408 4.145687 4.145687 22.566 3.935495 30.461 2.931068 4.145157 31.322 2.852432 3.935495 4.033948 33.14 2.699987 36.752 2.442494 38.271 2.34897 4.068535 43.643 2.071473 4.142945 46.171 1.963763 49.132 1.852114 4.141453 49.722 1.831509 51.426 1.774752 54.717 1.675528 4.104189 56.339 1.631074 3.927526 4.095379 Average 4.190560962 Std Dev 0.002363611 3.995299 Iron 2*theta d Average 4.124661 3.997529Explanation / Answer
The unit cell parameter a, is a measure of atomic spacing i.e., the distance between the adjacent atoms. The atomic spacing of atoms depends on their size and magnitude of intermolecular forces between them. Hence each element have unique unit cell parameters. Since transition metals although gave almost same size the magnitude of intermolecular forces are different due to different atomic numbers. Therefore their unit cell parameters and atomic spacing d, are different.
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