A Raman spectroscopic study of the natural carbonophosphates Na&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;&amp;lt;i&amp;gt;M&amp;lt;/i&amp;gt;CO&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;PO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; (&amp;lt;i&amp;gt;M&amp;lt;/i&amp;gt; is Mn, Fe, and Mg)
European journal of mineralogy