crystalline forms of silicon carbide
... that there are more than 250 different crystalline forms of silicon carbide, and that some of them have a 301.5 nm lattice constant, about 1,000 times longer than usual lattice spacings?
... that there are more than 250 different <b id="mwA1g"><a href="./Polymorphs_of_silicon_carbide" id="mwA1k" rel="mw:WikiLink" title="Polymorphs of silicon carbide">crystalline forms of silicon carbide</a></b>, and that some of them have a 301.5<span id="mwA1o" typeof="mw:Entity"> </span><a href="./Nanometre" id="mwA1s" rel="mw:WikiLink" title="Nanometre">nm</a> <a href="./Lattice_constant" id="mwA1w" rel="mw:WikiLink" title="Lattice constant">lattice constant</a>, about 1,000 times longer than usual lattice spacings?