Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Silicate substitution and a zinc ion replacing a calcium ion. One hydroxyl ion has been removed from the c-axis for charge compensation. (b) Silicate substitution and a charge compensatory H atom positioned on the silicate ion. The zinc substitution is on the c-axis in the 2b position between two oxygen ions. Oxygen is shown in red, calcium green, phosphorus purple, zinc grey, silicon orange and hydrogen in white. (Online version in colour.)
