Talk:Zircon
From Academic Kids
What does "an age of 4.404 Ga" mean?
this should be: "an age of 4.404 x 109years, this age is interpreted as crystallisation age " --Chd
What does "(crystal class: 4/m 2/m 2/m)" mean? Could someone explain it or link to a new page for whatever this system is? -- Tarquin 20:36 Dec 29, 2002 (UTC)
4/m 2/m 2/m is a tetragonal space group. It basically tells what symmetry elements can you expect in the zircon crystal structure. Some info is available at: http://www.uwgb.edu/dutchs/SYMMETRY/symmetry.htm http://www-structure.llnl.gov/xray/tutorial/spcgrp_tut.htm http://euch3i.chem.emory.edu/proposal/1b_space_groups.htm
