Tetragonal - Trapezohedral Class (H-M Symbol (4 2 2))
LEGEND: Bold - (Valid Mineral Species) ! - Dana Number Added # - (Grandfathered as Valid} ? - (Discredited or otherwise Invalid Species) * - (Not Approved IMA) See Mouse Pointer Tool Tip on Mineral Name for more Information
| Mineral | Space Grp |
a | c | Z | Vol (Ang3) | Calc Dens |
Meas Dens |
| Cristobalite # | P41212 | 4.971 | 6.918 | 4 | 170.95 | 2.33 | 2.3 |
| Cyrilovite # | P412121,P432121 | 7.334 | 19.368 | 4 | 1,041.76 | 3.09 | 3.1 |
| Ekanite | I422 | 7.483 | 14.893 | 2 | 833.94 | 3.41 | 3.1 |
| Formicaite ! | P41212 | 6.77 | 9.463 | 4 | 433.72 | 1.99 | 1.9 |
| Genkinite | P41212 | 7.736 | 24.161 | 8 | 1,445.93 | 9.71 | 8.8 |
| Kamphaugite-(Y) | P41212 | 7.434 | 21.793 | 4 | 1,204.38 | 3.23 | 3.2 |
| Lemanskiite ! | P4122 or P4322 | 9.9758 | 36.714 | 8 | 3,653.65 | 3.86 | 3.8 |
| Lipscombite # | P41212 | 7.31 | 13.212 | 4 | 706.00 | 3.68 | 3.7 |
| Mahnertite ! | I4mmm | 10.0371 | 23.739 | 8 | 2,391.55 | 3.14 | 3.1 |
| Maucherite # | P41212,P43212 | 6.868 | 21.8 | 4 | 1,028.29 | 8.04 | 7.8 |
| Mellite # | P4122,P4322 | 21.91 | 23.2 | 16 | 11,137.1 | 1.27 | 1.5 - 1.6 |
| Millisite # | P41212,P43212 | 7 | 19.07 | 2 | 934.43 | 2.90 | 2.8 |
| Paratellurite | P41212,P43212 | 4.81 | 7.613 | 4 | 176.14 | 6.02 | 5.6 |
| Pottsite | I4122 | 11.084 | 12.634 | 10 | 1,552.15 | 7.31 | 7.0 |
| Retgersite # | P41212,P43212 | 6.782 | 18.28 | 4 | 840.80 | 2.08 | 2.1 |
| Saryarkite-(Y) | P4212,P42212 | 8.213 | 6.55 | 1 | 441.82 | 3.48 | 3.1 - 3.2 |
| Sweetite | P41212,P43212 | 8.222 | 14.34 | 20 | 969.40 | 3.41 | 3.3 |
| Ungavaite ! | P41212, P4122, P43212 | 7.7388 | 24.145 | 8 | 1,446.02 | 7.26 | |
| Uytenbogaardtite | P4122 | 9.75 | 9.85 | 8 | 936.37 | 8.29 | |
| Vinciennite | P4122 | 10.697 | 10.697 | 2 | 1,224.01 | 4.31 | 4.3 |
| Wardite # | P41212 | 7.0587 | 19.062 | 4 | 949.77 | 2.78 | 2.8 - 2.9 |
| Zdenekite | P4122,P4322 | 10.066 | 39.39 | 8 | 3,991.17 | 4.09 | 4.1 |
| Zinclipscombite ! | P43212 or P41212 | 7.242 | 13.125 | 4 | 688.36 | 3.72 | 3.7 |