Corundum standard: JCPDS card 46-1212
3.4797   45.
2.5508  100.
2.3795   21.
2.1654    2.
2.0853   66.
1.9643    1.
1.7401   34.
1.6016   89.
1.5467    1.
1.5151    2.
1.5110   14.
1.4045   23.
1.3737   27.
1.3360    1.
1.2756    2.
1.2392   29.
1.2343   12.
1.1932    1.
1.1897    2.
1.1600    1.
1.1472    3.
1.1386    1.
1.1257    2.
1.1242    3.
1.0990    9.
