Hexagonal - Dihexagonal Dipyramidal Class (H-M Symbol (6/m 2/m 2/m))
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| Mineral | Space Grp |
a | c | Z | Vol (Ang3) | Calc Dens |
Meas Dens |
| Akhtenskite | P63mmc | 2.85 | 4.48 | 1 | 31.51 | 4.58 | 4.0 |
| Algodonite # | P63mmc | 2.6 | 4.228 | 0.3 | 24.75 | 9.18 | 8.4 - 8.7 |
| Allargentum # | P63mmc | 2.945 | 4.77 | 2 | 35.83 | 10.01 | 10.0 |
| Almarudite ! | P6/mcc | 9.997 | 14.09 | 2 | 1,219.50 | 2.72 | |
| Astrocyanite-(Ce) | P6/mmm | 14.96 | 26.86 | 12 | 5,205.95 | 3.64 | 3.8 |
| Atheneite | P6/mmm | 6.798 | 3.483 | 2 | 139.39 | 11.07 | 10.2 |
| Barbertonite # | P63mmc | 6.17 | 15.52 | 1 | 511.67 | 2.12 | 2.1 |
| Batiferrite ! | P63mmc | 5.908 | 23.39 | 2 | 707.04 | 5.03 | |
| Bazzite # | P6/mcc | 9.521 | 9.165 | 2 | 719.50 | 2.61 | 2.8 |
| Bentorite | P63mmc | 22.35 | 21.41 | 8 | 9,261.95 | 1.85 | 2.0 |
| Berezanskite ! | P6/mcc | 9.903 | 14.274 | 2 | 1,212.30 | 2.66 | 2.7 |
| Beryl # | P6/mmc | 9.215 | 9.192 | 2 | 675.98 | 2.64 | 2.6 - 2.9 |
| Brannockite | P6/mcc | 10.002 | 14.263 | 2 | 1,235.71 | 2.99 | 3.0 |
| Breithauptite # | P63mmc | 3.93 | 5.13 | 2 | 68.62 | 8.73 | 8.2 |
| Brugnatellite # | P63mmc | 5.48 | 16 | 1 | 416.11 | 2.21 | 2.1 |
| Burbankite # | P63mmc | 10.53 | 6.47 | 2 | 621.29 | 3.77 | 3.5 |
| Burnsite ! | P63mmc | 8.7805 | 15.521 | 2 | 1,036.31 | 3.85 | |
| Buttgenbachite # | P63mmc | 15.82 | 9.13 | 2 | 1,978.86 | 3.45 | 3.4 |
| Cacoxenite # | P6/mmm | 27.559 | 10.655 | 3 | 7,008.27 | 3.19 | 2.3 - 3.4 |
| Cadmium | P63mmc | 2.979 | 5.617 | 2 | 43.17 | 8.65 | 8.6 |
| Catamarcaite ! | P63mc | 7.5238 | 12.39 | 2 | 607.40 | 4.93 | |
| Chaoite | P6/mmm | 8.948 | 14.078 | 168 | 976.17 | 3.43 | 3.3 - 3.4 |
| Chayesite | P6/mcc | 10.153 | 14.388 | 2 | 1,284.46 | 2.69 | |
| Claringbullite | P63mmc | 6.6733 | 9.185 | 2 | 354.23 | 3.83 | 3.9 |
| Cordylite-(Ce) # | P63mmc | 5.093 | 23.017 | 2 | 517.04 | 4.08 | 4.4 |
| Covellite # | P63mmc | 3.792 | 16.344 | 6 | 203.53 | 4.68 | 4.6 - 4.8 |
| Darapiosite | P6/mcc | 10.32 | 14.39 | 2 | 1,327.24 | 2.82 | 2.9 |
| Diaoyudaoite | P63mmc | 5.602 | 22.626 | 2 | 614.93 | 3.20 | 3.3 |
| Dmisteinbergite | P6/mmm | 5.122 | 14.781 | 2 | 335.83 | 2.75 | |
| Drysdallite | P63mmc | 3.286 | 12.899 | 2 | 120.62 | 6.34 | 6.2 |
| Dugganite | P6/mmm | 8.472 | 5.208 | 1 | 323.72 | 6.68 | 6.3 |
| Dusmatovite | P6/mcc | 10.218 | 14.292 | 2 | 1,292.28 | 3.02 | 3.0 |
| Eifelite | P6/mcc | 10.137 | 14.223 | 2 | 1,265.73 | 2.68 | 2.7 |
| Erionite-Ca ! | P63mmc | 13.333 | 15.091 | 1 | 2,323.30 | 2.08 | 2.1 |
| Erionite-K ! | P63mmc | 13.2 | 15.075 | 1 | 2,274.76 | 2.16 | 2.1 |
| Erionite-Na # | P63mmc | 13.21 | 15.048 | 1 | 2,274.13 | 2.05 | 2.1 |
| Ettringite # | P63mmc | 22.46 | 21.44 | 8 | 9,366.45 | 1.78 | 1.8 |
| Fairchildite # | P63mmc | 5.272 | 13.28 | 2 | 319.65 | 2.48 | 2.4 |
| Farneseite ! | P63m | 12.8784 | 37.0078 | 1 | 5,315.55 | 2.52 | |
| Fleischerite | P63mmc | 8.89 | 10.86 | 2 | 743.30 | 4.50 | 4.2 - 4.4 |
| Fluocerite-(Ce) # | P63mcm | 7.12 | 7.28 | 6 | 319.61 | 6.14 | 6.1 |
| Freboldite # | P63mmc | 3.61 | 5.28 | 2 | 59.59 | 7.68 | |
| Friedrichbeckeite ! | P6/mcc | 9.97 | 14.13 | 2 | 1,216.36 | 2.68 | |
| Gmelinite-Ca ! | P63mmc | 13.8 | 9.964 | 1 | 1,643.32 | 2.11 | 2.0 - 2.2 |
| Gmelinite-K ! | P63mmc | 13.621 | 10.254 | 1 | 1,647.56 | 2.05 | 2.0 |
| Gmelinite-Na # | P63mmc | 13.756 | 10.048 | 1 | 1,646.63 | 2.02 | 2.0 - 2.2 |
| Graphite # | P63mmc | 2.464 | 6.736 | 4 | 35.42 | 2.25 | 2.1 - 2.2 |
| Haggertyite ! | P63mmc | 5.926 | 23.32 | 2 | 709.22 | 4.87 | |
| Hauckite | P6/mmm | 9.17 | 30.21 | 1 | 2,199.99 | 3.01 | 3.0 - 3.1 |
| Hawthorneite | P63mmc | 5.871 | 23.06 | 2 | 688.36 | 5.02 | |
| Heterogenite-2H | P63mmc | 2.855 | 8.805 | 2 | 62.15 | 4.91 | 4.3 |
| Hexaferrum ! | P63mmc | 2.591 | 4.168 | 2 | 24.23 | 11.86 | |
| Hexamolybdenum ! | P63mmc | 2.7506 | 4.4318 | 2 | 29.04 | 11.90 | |
| Hexatestibiopanickelite | P63mmc | 3.983 | 5.339 | 2 | 73.35 | 8.91 | 8.9 |
| Hibonite # | P63mmc | 5.564 | 21.892 | 2 | 586.94 | 4.01 | 3.8 |
| Ice # | P63mmc | 4.51 | 7.35 | 4 | 129.47 | .92 | .9 |
| Idaite # | P63mmc | 3.9 | 16.95 | 1 | 223.27 | 4.21 | 4.2 |
| IMA2008-009 ! | P63m | 9.845 | 7.383 | 2 | 619.72 | 3.98 | |
| IMA2008-055 ! | P63mmc | 2.6941 | 4.2731 | 2 | 26.86 | 8.80 | |
| IMA2009-005 | P63m | 9.4437 | 6.8169 | 2 | 526.50 | 4.39 | |
| IMA2009-027 | P63mmc | 5.613 | 22.285 | 2 | 608.04 | 3.69 | |
| IMA2009-030 | P63mmc | 5.875 | 23.137 | 1 | 691.60 | 2.67 | |
| Imgreite ? | P63mmc | 3.937 | 5.354 | 2 | 71.87 | 8.61 | 8.5 - 8.6 |
| Indialite # | P6/mcc | 9.812 | 9.351 | 2 | 779.66 | 2.49 | 2.5 |
| Jaipurite * | P63mmc | 3.367 | 5.16 | 2 | 50.66 | 5.97 | 5.4 |
| Kittatinnyite | P63mmc | 6.498 | 22.78 | 2 | 833.00 | 2.63 | 2.6 |
| Kleinite # | C63/mmc | 13.56 | 11.13 | 18 | 1,772.33 | 8.01 | 8.0 |
| Klochite | P6/mcc | 10.12 | 14.298 | 2 | 1,268.14 | 3.11 | |
| Klockmannite # | P63mmc | 3.938 | 17.25 | 6 | 231.67 | 6.13 | 6.0 |
| Kokchetavite ! | P6/mmm(?) | 5.27 | 7.82 | 1 | 188.09 | 2.46 | |
| Kotulskite | P63mmc | 4.19 | 5.67 | 2 | 86.21 | 9.80 | 8.3 |
| Koutekite # | P63mmc | 11.51 | 14.54 | 18 | 1,668.19 | 8.38 | 8.5 |
| Langisite | P63mmc | 3.538 | 5.127 | 2 | 55.58 | 7.99 | 8.2 |
| Lindqvistite | P63mmc | 5.951 | 33.358 | 2 | 1,023.08 | 5.73 | 5.8 |
| Lonsdaleite | P63mmc | 2.52 | 4.12 | 4 | 22.66 | 3.52 | 3.3 - 3.5 |
| Luanheite | P63mmc | 6.61 | 10.98 | 6 | 415.47 | 12.57 | 12.5 |
| Lukechangite-(Ce) ! | P63mmc | 5.068 | 22.87 | 2 | 508.71 | 3.97 | 4.0 |
| Magnetoplumbite # | P63mmc | 5.873 | 23.007 | 2 | 687.24 | 5.71 | 5.5 |
| Manasseite # | P63mmc | 6.12 | 15.324 | 1 | 497.06 | 2.02 | 2.0 |
| Mavlyanovite ! | P63mcm | 6.8971 | 4.8075 | 2 | 198.05 | 6.02 | |
| Mazzite-Mg | P63mmc | 18.392 | 7.646 | 1 | 2,239.87 | 2.08 | 2.1 |
| Mazzite-Na ! | P63mmc | 18.2343 | 7.6371 | 1 | 2,199.06 | 2.18 | |
| Merrihueite | P6/mcc | 10.16 | 14.32 | 2 | 1,280.15 | 2.92 | 2.9 |
| Methane hydrate-H ! | P6/mmm | 12.26 | 10.17 | 1 | 1,323.83 | .96 | .9 |
| Milarite # | P6/mcc | 10.41 | 13.845 | 1 | 1,299.35 | 2.53 | 2.5 |
| Molybdenite # | P63mmc | 3.16 | 12.3 | 2 | 106.37 | 5.00 | 5.5 |
| Natrofairchildite | P63mmc | 5.291 | 13.218 | 2 | 320.46 | 2.14 | 2.5 |
| Nezilovite ! | P63mmc | 5.854 | 22.882 | 2 | 679.09 | 5.84 | 5.7 |
| Nickeline # | P63mmc | 3.609 | 5.019 | 2 | 56.61 | 7.84 | 7.8 |
| Niggliite # | P63mmc | 4.111 | 5.446 | 2 | 79.71 | 13.07 | 13.4 |
| Oftedalite ! | P6/mmc | 10.097 | 13.991 | 2 | 1,235.28 | 2.62 | |
| Osmium # | P63mmc | 2.714 | 4.314 | 2 | 27.52 | 23.01 | 19.0 - 21.0 |
| Osumilite-(Fe) # | P6/mcc | 10.155 | 14.284 | 2 | 1,275.68 | 2.73 | 2.6 |
| Osumilite-(Mg) | P6/mcc | 10.117 | 14.255 | 2 | 1,263.58 | 2.67 | 2.6 |
| Penfieldite # | P6/mmm | 11.28 | 48.65 | 36 | 5,360.83 | 6.00 | 5.8 |
| Perhamite | P6/mmm | 7.02 | 20.21 | 1 | 862.52 | 2.53 | 2.6 |
| Perlialite | P6/mmm | 18.49 | 7.51 | 1 | 2,223.54 | 2.26 | 2.1 |
| Plumboferrite # | P63mmc | 5.931 | 23.551 | 2 | 717.46 | 6.08 | 6.0 |
| Plumbopalladinite | P63mmc | 4.47 | 5.719 | 1 | 98.96 | 12.31 | 12.4 |
| Poudretteite | P6/mcc | 10.239 | 13.485 | 2 | 1,224.33 | 2.48 | 2.5 |