If given the edge length for a cubic unit cell (whether its simple, BCC, or FCC), how does one determine the volume occupied by the atoms, empty space, and the packing efficiency? The density of solid W is 19.3...
更新1: Hexagonal close-packing: 74.1% 呢?Packing efficiency =volume of spheres in unit cell / volume of unit cell = no. of atom in unit cell X(volume of sphere) / (edge length)^3 For simple cubic packing : Edge length = 2r no of atom in unit cell = 1 Packing effi...
However, all underlying nets of protein crystals in Table 1 are well known and almost all of them (except nets chb, smt, yfh) are fcu and hcp subnets. Interestingly, the 14-coordinated body-centered cubic packing (bcu-x), which is the most frequent in small molecule crystals is rather ...
For MBfRs’ design and operation, the key parameters include the packing density of membranes, gas pressure, HRT and surface loading of MPs. The increase of packing density usually enhances the removal efficiency, whereas excessively high packing densities are susceptible to fouling or clogging, also...
It is therefore essential to develop energy storage systems that maximize such energy utilization efficiency. In addition, the intelligentization of modern society is resulting in massive demands for off-network energy use, directed to such devices as portable electronics and electric vehicles, which ...
Model Size(mm) Specific Surface Area(m2/m3) Bio-film formation Duration Nitrification Efficiency Preferential Temperature (ºC) Services life(years) Number of unites per m3 (days) PE01 Φ12×9 >800 5~15 400-1200 <65 ≥10 >660,000 PE02 Φ11×7 >900 ...