What is the chemical symbol for diamond?
Pearson symbol centred face cuts the X-axis, the Bravais lattice is called A-centred. In analogy, when the centred face cuts the Y- or Z-axis, we have B- or C-centring, respectively. The fourteen possible Bravais lattices are identified by the first two letters: The Pearson symbol does not uniquely identify the space group of a crystal structure, for example both the NaCl structure, (space group Fmm) and diamond (space group Fdm) have the same Pearson symbol "cF"8. Confusion also arises in the rhombohedral lattice which is alternatively described in a centred hexagonal (a=b, c, α=β=90º, γ=120º) or primitive rhombohedral (a=b=c, α=β=γ) setting. The
CB military symbol CB military symbol Chemical, biological (CB) — and sometimes radiological — warfare agents were assigned what is termed a military symbol by the U.S. military until the American chemical and biological weapons programs were terminated (in 1990 and 1969, respectively). Military symbols applied to the CB agent fill, and not to the entire weapon. A chemical or biological weapon designation would be, for example, "Aero-14/B", which could be filled with GB, VX, TGB, or with a biological modification kit – OU, NU, UL, etc. A CB weapon is an integrated device of (1) agent, (2) dissemination means, and (3) delivery