Trigonal - Rhombohedral Class (H-M Symbol ( 3))
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 |
| Akimotoite ! | R3 | 4.78 | 13.6 | 4 | 269.11 | 2.67 | |
| Allendeite ! | R3 | 9.396 | 8.72 | 3 | 666.70 | 4.85 | |
| Andersonite # | R3 | 18.009 | 23.838 | 18 | 6,695.45 | 2.88 | 2.8 - 2.9 |
| Ankerite # | R3 | 4.83 | 16.167 | 3 | 326.63 | 3.15 | 3.0 - 3.1 |
| Armangite # | P3 | 13.491 | 8.855 | 1 | 1,395.75 | 4.41 | 4.4 |
| Belovite-(La) ! | P3 | 9.647 | 7.17 | 2 | 577.88 | 4.98 | 4.2 |
| Brizziite-III | R3 | 5.301 | 15.932 | 6 | 387.72 | 4.95 | 4.8 - 4.9 |
| Brizziite-VII | R3 | 5.301 | 15.932 | 6 | 387.72 | 4.95 | 4.8 - 4.9 |
| Burtite | R3 | 8.128 | 8.128 | 4 | 465.03 | 3.73 | 3.3 |
| Chalcophanite # | R3 | 7.533 | 20.794 | 5 | 1,021.89 | 3.73 | 3.9 |
| Chladniite | R3 | 14.967 | 42.595 | 40 | 8,263.40 | 6.81 | 3.0 |
| Cleusonite ! | R3 | 10.576 | 21.324 | 3 | 2,065.58 | 5.02 | 4.7 |
| Crichtonite # | R3 | 10.374 | 20.756 | 3 | 1,934.49 | 4.56 | 4.5 |
| Cualstibite | P3 | 9.2 | 9.73 | 1 | 713.21 | 3.35 | 3.2 |
| Davidite-(Ce) | R3 | 10.376 | 20.91 | 3 | 1,949.60 | 4.78 | 4.4 - 4.5 |
| Davidite-(La) # | R3 | 10.376 | 20.91 | 3 | 1,949.60 | 4.75 | 4.4 |
| Dessauite ! | P3 | 10.385 | 20.921 | 3 | 1,954.01 | 4.73 | 4.7 |
| Dioptase # | R3 | 14.57 | 7.78 | 18 | 1,430.31 | 3.29 | 3.3 |
| Dolomite # | R3 | 4.842 | 15.95 | 3 | 323.85 | 2.84 | 2.8 - 2.9 |
| Ecandrewsite | R3 | 5.09 | 14.036 | 6 | 314.93 | 4.98 | |
| Eitelite # | R3 | 4.9423 | 16.396 | 3 | 346.84 | 2.73 | 2.7 |
| Erniggliite | P3 | 6.68 | 7.164 | 1 | 276.85 | 5.22 | |
| Eucryptite # | R3 | 13.48 | 9.001 | 18 | 1,416.45 | 2.66 | 2.7 |
| Ferrinatrite # | P3 | 15.57 | 8.67 | 6 | 1,820.23 | 2.74 | 2.5 - 2.6 |
| Fibroferrite # | R3 | 24.12 | 7.63 | 18 | 3,844.24 | 2.01 | 1.9 |
| Fillowite # | R3 | 15.282 | 43.507 | 18 | 8,799.34 | 3.54 | 3.4 |
| Gagarinite-(Y) | P3 | 5.99 | 3.53 | 1 | 109.69 | 4.40 | 4.2 |
| Galileiite ! | R3 | 14.98 | 41.66 | 35 | 8,096.06 | 3.81 | 3.9 |
| Geikielite # | R3 | 5.086 | 14.093 | 6 | 315.71 | 3.79 | 4.0 |
| Gillardite ! | R3m | 6.8364 | 13.8459 | 3 | 560.41 | 3.76 | |
| Gramaccioliite-(Y) ! | R3 | 10.411 | 20.97 | 3 | 1,968.40 | 4.61 | |
| Haydeeite ! | R3m | 6.2733 | 5.7472 | 1 | 195.88 | 3.24 | 3.3 |
| Humberstonite | R3 | 10.9 | 24.41 | 3 | 2,511.61 | 2.25 | 2.3 |
| Hyttsjoite ! | R3 | 9.865 | 79.45 | 3 | 6,696.05 | 5.10 | 5.1 |
| Ilmenite # | R3 | 5.093 | 14.06 | 6 | 315.84 | 4.79 | 4.7 |
| IMA2008-006 ! | P3 | 12.8742 | 87.215 | 1 | 12,518.8 | 2.51 | |
| IMA2009-031 | R3 | 22.023 | 9.237 | 3 | 3,879.85 | 2.08 | |
| Jaffeite | P3 | 10.026 | 7.482 | 2 | 651.33 | 2.34 | 2.7 |
| Johnsomervilleite | R3 | 15 | 42.75 | 18 | 8,330.08 | 3.43 | 3.3 |
| Keithconnite | R3 | 11.45 | 11.4 | 18 | 1,294.33 | 9.83 | |
| Kuannersuite-(Ce) ! | P3 | 9.9097 | 7.4026 | 1 | 629.56 | 4.50 | |
| Kutnohorite # | R3 | 4.85 | 16.34 | 3 | 332.86 | 3.08 | 3.1 |
| Landauite | R3 | 10.366 | 20.77 | 3 | 1,932.81 | 4.46 | 4.4 |
| Lindsleyite | R3 | 10.37 | 20.52 | 3 | 1,911.02 | 4.60 | 4.6 |
| Loveringite | R3 | 10.337 | 20.677 | 3 | 1,913.41 | 4.37 | 4.4 |
| Loweite # | R3 | 18.866 | 13.434 | 3 | 4,140.91 | 2.36 | 2.4 |
| Mathiasite | R3 | 10.36 | 20.65 | 3 | 1,919.42 | 4.37 | 4.6 |
| Melanostibite # | R3 | 5.226 | 14.325 | 6 | 338.82 | 5.83 | 5.6 |
| Metavoltine # | P3 | 9.545 | 18.09 | 1 | 1,427.32 | 2.55 | 2.5 |
| Mikasaite | R3 | 8.14 | 21.99 | 6 | 1,261.84 | 3.16 | 3.1 |
| Millosevichite # | R3 | 8.055 | 21.191 | 6 | 1,190.73 | 2.98 | 2.9 |
| Minrecordite | R3 | 4.8183 | 16.0295 | 3 | 322.28 | 3.49 | 3.5 |
| Molysite # | R3 | 5.92 | 17.26 | 6 | 523.86 | 3.08 | 2.9 |
| Nikischerite ! | R3 | 9.352 | 33.08 | 3 | 2,505.56 | 2.32 | 2.3 |
| Nordenskioldine # | R3 | 4.853 | 15.92 | 3 | 324.71 | 4.24 | 4.2 |
| Paracoquimbite # | R3 | 10.93 | 51.3 | 12 | 5,307.48 | 2.11 | 2.1 |
| Paratacamite # | R3 | 13.654 | 14.041 | 24 | 2,266.98 | 3.77 | 3.7 |
| Phenakite # | R3 | 12.472 | 8.252 | 18 | 1,111.63 | 2.96 | 3.0 |
| Pyrophanite # | R3 | 5.137 | 14.29 | 6 | 326.57 | 4.60 | 4.5 |
| Reyerite # | P3 | 9.764 | 19.07 | 1 | 1,574.48 | 2.65 | 2.5 - 2.6 |
| Sabelliite ! | P3 | 8.201 | 7.315 | 3 | 426.07 | 4.61 | 4.7 |
| Senaite # | R3 | 10.393 | 20.811 | 3 | 1,946.73 | 4.87 | 5.3 |
| Shigaite | R3 | 9.512 | 33.074 | 3 | 2,591.56 | 2.31 | 2.3 |
| Slavikite # | R3 | 12.2 | 35.13 | 3 | 4,528.23 | 1.89 | 1.9 - 2.1 |
| Stillwaterite | P3 | 7.399 | 10.311 | 3 | 488.85 | 10.97 | 10.4 |
| Stornesite-(Y) ! | R3 | 14.9628 | 42.756 | 3 | 8,289.98 | 3.20 | |
| Susannite # | R3 | 9.05 | 11.54 | 3 | 818.53 | 6.57 | 6.6 |
| Tachyhydrite # | P3 | 10.136 | 17.318 | 3 | 1,540.85 | 1.67 | 1.7 |
| Tuliokite | R3 | 14.175 | 8.605 | 3 | 1,497.37 | 3.25 | 3.2 |
| Tusionite | R3 | 4.787 | 15.3 | 3 | 303.63 | 4.78 | 4.7 |
| Ungemachite # | R3 | 10.898 | 24.989 | 3 | 2,570.24 | 2.26 | 2.3 |
| Willemite # | R3 | 13.94 | 9.31 | 18 | 1,566.77 | 4.25 | 3.9 - 4.2 |
| Yedlinite | R3 | 12.868 | 9.821 | 3 | 1,408.34 | 5.79 | 5.8 |
| Yoshiokaite | P3 | 9.939 | 8.245 | 1 | 705.35 | 2.93 | 2.8 - 2.9 |
| Zajacite-(Ce) | P3 | 6.099 | 11.064 | 3 | 356.42 | 4.12 | 4.4 - 4.6 |
| Zeophyllite # | R3 | 9.34 | 36.48 | 8 | 2,756.00 | 2.68 | 2.7 - 2.8 |
| Zincalstibite ! | P3 | 5.321 | 9.786 | 2 | 239.95 | 6.69 | |
| Zincowoodwardite ! | P3- or R3m | 3.0364 | 8.85 | 1 | 70.66 | 2.42 | 2.7 |
| Zincowoodwardite-1T ! | P3 | 3.064 | 8.85 | 1 | 71.95 | 2.80 | 2.7 |
| Zoltaiite ! | P3 | 7.6014 | 9.2195 | 1 | 461.34 | 4.82 |