Orthorhombic - Dipyramidal Class (H-M Symbol (2/m 2/m 2/m))
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| Mineral | Space Grp |
a | b | c | Z | Vol (Ang3) | Calc Dens |
Meas Dens |
| Strontianite # | Pmcn | 5.107 | 8.414 | 6.029 | 4 | 259.07 | 3.78 | 3.8 |
| Strontiodresserite | Pbmm | 9.14 | 15.91 | 5.594 | 4 | 813.46 | 2.74 | 2.7 |
| Sulfoborite # | Pnma | 10.132 | 12.537 | 7.775 | 4 | 987.62 | 2.43 | 2.4 |
| Sulfur # | Fddd | 10.45 | 12.845 | 24.46 | 16 | 3,283.27 | 2.08 | 2.0 - 2.1 |
| Suredaite ! | Pnma | 8.8221 | 3.7728 | 14.0076 | 4 | 466.23 | 5.56 | 5.5 - 5.9 |
| Sverigeite | Imma | 10.815 | 13.273 | 6.818 | 4 | 978.71 | 3.61 | 3.6 |
| Synadelphite # | Pnma | 10.754 | 18.865 | 9.884 | 4 | 2,005.21 | 3.61 | 3.6 - 3.8 |
| Takeuchiite | Pnnm | 27.5 | 12.614 | 6.046 | 24 | 2,097.27 | 3.69 | 3.9 |
| Tancoite | Pbcb | 7.041 | 14.13 | 6.975 | 4 | 693.94 | 2.76 | 2.8 |
| Tantalaeschynite-(Y) | Pbnm | 5.34 | 10.97 | 7.38 | 4 | 432.32 | 7.68 | 5.8 - 6.1 |
| Tantalite-(Fe) | Pcan | 5.73 | 14.24 | 5.08 | 4 | 414.50 | 8.23 | 8.2 |
| Tantalite-(Mg) ! | Pbcn | 14.355 | 5.735 | 5.058 | 4 | 416.40 | 6.78 | 6.7 |
| Tantalite-(Mn) # | Pcan | 5.772 | 14.465 | 5.097 | 4 | 425.56 | 8.00 | 8.1 |
| Tanteuxenite-(Y) # | Pcan | 5.18 | 14.57 | 5.52 | 3 | 416.61 | 5.75 | 5.4 - 5.9 |
| Taramellite # | Pmmn | 12.125 | 13.929 | 7.136 | 2 | 1,205.19 | 4.20 | 3.9 |
| Tarapacaite # | Pnam | 7.663 | 10.391 | 5.919 | 4 | 471.31 | 2.74 | 2.7 |
| Tassieite ! | Pbca | 12.4595 | 11.5955 | 12.7504 | 4 | 1,842.10 | 3.44 | |
| Teallite # | Pbnm | 4.266 | 11.419 | 4.09 | 2 | 199.24 | 6.50 | 6.4 |
| Tellurite # | Pbca | 5.607 | 12.034 | 5.463 | 8 | 368.61 | 5.75 | 5.9 |
| Tephroite # | Pnma | 4.76 | 10.2 | 5.98 | 4 | 290.34 | 4.62 | 4.1 - 4.4 |
| Ternesite ! | Pnma | 6.863 | 15.387 | 10.181 | 4 | 1,075.12 | 2.97 | 2.9 - 3.0 |
| Terranovaite ! | Cmcm | 9.747 | 23.88 | 20.068 | 1 | 4,670.99 | 1.98 | 2.0 - 2.1 |
| Teschemacherite # | Pccn | 7.255 | 10.709 | 8.746 | 8 | 679.51 | 1.55 | 1.6 |
| Thenardite # | Fddd | 9.75 | 12.29 | 5.85 | 8 | 700.99 | 2.69 | 2.7 |
| Theoparacelsite ! | Pmma | 8.3212 | 2.9377 | 4.6644 | 0.66666 | 114.02 | 4.72 | |
| Thermessaite ! | Pbcn | 10.81 | 8.336 | 6.822 | 4 | 614.75 | 2.80 | 2.8 |
| Thomsonite-Ca # | Pncn | 13.1043 | 13.0569 | 13.2463 | 4 | 2,266.46 | 2.36 | 2.3 - 2.4 |
| Thomsonite-Sr ! | Pcnn | 13.05 | 13.123 | 13.241 | 4 | 2,267.59 | 2.62 | 2.5 |
| Tintinaite | Pnnm | 22.3 | 34 | 4.04 | 2 | 3,063.13 | 5.79 | 5.5 |
| Titantaramellite | Pmmn | 12.137 | 13.955 | 7.134 | 2 | 1,208.30 | 3.97 | 4.0 - 4.1 |
| Tongbaite | Pnma | 5.57 | 11.47 | 2.816 | 4 | 179.91 | 6.65 | |
| Topaz # | Pbnm | 4.35 | 8.8 | 8.4 | 4 | 321.55 | 3.76 | 3.5 - 3.6 |
| Triphylite # | Pbnm | 6.0285 | 10.3586 | 4.7031 | 4 | 293.69 | 3.57 | 3.4 - 3.6 |
| Tsumgallite ! | Pbnm | 4.512 | 9.772 | 2.967 | 4 | 130.82 | 5.08 | |
| Tuhualite # | Cmca | 14.31 | 17.28 | 10.11 | 8 | 2,499.97 | 2.90 | 2.9 |
| Tungstite # | Pmnb | 5.328 | 10.704 | 5.12 | 4 | 292.00 | 5.68 | 5.5 |
| Tyrolite # | Pmma | 10.212 | 55.51 | 5.602 | 4 | 3,175.60 | 1.82 | 3.1 - 3.2 |
| Tyuyamunite # | Pnan | 10.36 | 8.36 | 20.4 | 4 | 1,766.84 | 3.45 | 3.3 - 4.3 |
| Uchucchacuaite | Pmmm | 12.67 | 19.32 | 4.38 | 2 | 1,072.16 | 5.51 | 5.2 |
| Uranopolycrase | Pbcn | 14.51 | 5.558 | 5.173 | 3 | 417.18 | 4.96 | 5.5 - 6.0 |
| Uranospinite # | Pnma | 14.35 | 20.66 | 7.17 | 4 | 2,125.70 | 3.24 | 3.5 |
| Valentinite # | Pccn | 4.92 | 12.46 | 5.42 | 4 | 332.26 | 5.83 | 5.6 - 5.8 |
| Vanadiocarpholite ! | Ccca | 13.83 | 20.681 | 5.188 | 8 | 1,483.86 | 3.16 | |
| Vandendriesscheite # | Pbca | 14.1165 | 41.378 | 14.5347 | 8 | 8,489.90 | 5.50 | 5.4 |
| Varennesite | Cmcm | 13.447 | 15.022 | 17.601 | 4 | 3,555.42 | 2.31 | 2.3 |
| Variscite # | Pcab | 9.9 | 9.66 | 17.18 | 16 | 1,642.99 | 2.55 | 2.5 |
| Vergasovaite ! | Pnma | 7.42 | 6.741 | 13.548 | 4 | 677.65 | 4.35 | |
| Versiliaite | Pbam ? | 8.499 | 8.326 | 11.935 | 1 | 844.55 | 5.04 | 5.1 |
| Vigezzite | Pmnb | 7.559 | 11.028 | 5.36 | 4 | 446.81 | 5.53 | 5.5 |
| Vonsenite # | Pbam | 9.452 | 12.287 | 3.072 | 4 | 356.77 | 4.81 | 4.2 |
| Vrbaite # | Cmca | 13.189 | 23.235 | 11.223 | 2 | 3,439.25 | 2.80 | 5.3 - 2.3 |
| Vulcanite | Pmnm | 4.09 | 6.95 | 3.15 | 2 | 89.54 | 7.09 | 7.1 |
| Vyalsovite | Cmmm ? | 14.2 | 20.98 | 5.496 | 8 | 1,637.35 | 1.95 | 2.0 |
| Warwickite # | Pnam | 9.197 | 9.358 | 3.085 | 4 | 265.51 | 3.68 | 3.4 |
| Wavellite # | Pcmn | 15.25 | 17.338 | 6.986 | 6 | 1,847.13 | 2.27 | 2.3 - 2.4 |
| Weberite # | Imma | 7.06 | 10 | 7.303 | 4 | 515.59 | 2.97 | 3.0 |
| Weeksite | Cmmb | 14.209 | 14.248 | 35.869 | 16 | 7,261.67 | 3.76 | 4.1 |
| Weibullite # | Pnma | 15.39 | 4.068 | 53.8 | 4 | 3,368.23 | 7.26 | 7.0 - 7.1 |
| Westerveldite | Pnam | 3.457 | 5.971 | 5.332 | 4 | 110.06 | 7.96 | |
| Wicksite | Pbca | 12.896 | 12.511 | 11.634 | 4 | 1,877.05 | 3.58 | 3.5 |
| Wilhelmramsayite ! | Pmmm | 5.147 | 7.289 | 5.889 | 1 | 220.93 | 2.84 | 2.8 |
| Wilhelmvierlingite | Pbca | 14.8 | 18.5 | 7.31 | 8 | 2,001.48 | 2.61 | 2.6 |
| Witherite # | Pmcn | 5.313 | 8.904 | 6.43 | 4 | 304.18 | 4.31 | 4.3 |
| Xieite ! | Bbmm | 9.462 | 9.562 | 2.916 | 4 | 263.83 | 5.34 | |
| Yakovenchukite-(Y) ! | Pcca | 14.972 | 14.137 | 14.594 | 4 | 3,088.95 | 2.70 | 2.8 |
| Yanomamite | Pbca | 10.446 | 9.085 | 10.345 | 8 | 981.76 | 3.92 | 3.9 |
| Yftisite-(Y) ? | Cmcm | 14.949 | 10.626 | 7.043 | 4 | 1,118.77 | 4.47 | 4.0 |
| Yingjiangite | Bmmb | 15.707 | 17.424 | 13.692 | 4 | 3,747.21 | 4.62 | 4.5 |
| Yuanfuliite | Pnam | 9.258 | 9.351 | 3.081 | 4 | 266.73 | 3.74 | 4.0 |
| Zektzerite | Cmca | 14.33 | 17.354 | 10.164 | 8 | 2,527.61 | 2.78 | 2.8 |
| Zimbabweite | Ccmb | 12.245 | 15.287 | 8.684 | 4 | 1,625.55 | 6.12 | 6.2 |
| Zincolibethenite ! | Pnnm | 8.3263 | 8.2601 | 5.8771 | 4 | 404.20 | 3.96 | |
| Zincolivenite ! | Pnnm | 8.5 | 8.52 | 5.99 | 4 | 433.80 | 4.36 | 4.3 |
| Zirconolite-3O # | Cmca | 10.148 | 14.147 | 7.278 | 8 | 1,044.86 | 4.90 | 4.7 |
| Zircosulfate | Fddd | 25.92 | 11.62 | 5.532 | 8 | 1,666.19 | 2.83 | 2.8 |
| Zoisite # | Pnmc | 16.24 | 5.58 | 10.1 | 4 | 915.25 | 3.30 | 3.3 |
| Zorite | Cmmm | 23.241 | 7.238 | 6.955 | 1 | 1,169.96 | 2.18 | 2.4 |