To create characterization in fiction or non-fiction, 1  Tell the reader directly what a character's personality is like: 2  Describe a character's appearance and manner: 3  Portray a character's thoughts and motivations:  Use dialogue to allow a character's words to reveal something important about his or her nature:
Cherniak (2010b) reviews diffusion in the accessory minerals zircon, monazite, apatite, and xenotime, phases important in geochronologic studies. Diffusion in other minerals, including carbonates, sulfide minerals, fluorite and diamond, is reviewed by Cherniak (2010c).
One of the possible net effects of diffusion is that atoms move from regions of high concentration of one element to regions with low concentration, until the concentration is equal throughout the sample. This model demonstrates a solid diffusion couple, such as copper and nickel. In a real laboratory, such experiment would take place at very high temperatures, for the process to take place in a reasonable amount of time (note that the diffusion coefficient varies exponentially with the inverse of the temperature).