Tetragonal Scalenohedral Class (original) (raw)

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Axial Configuration Paper Model

Tetragonal - Scalenohedral Class (4 2 m) Mineral Species Listing

System Class Name AXES Planes Center Hermann- Maugin Symbols
2-Fold 3-Fold 4-Fold 6-Fold
Tetragonal Scalenohedral 3 - - - 2 - 4 2 m

Synonyms: Sphenoidal Class, Chalcopyrite Type, Tetragonal Sphenoidal, Sphenoidal Hemihedral, Didigonal Scalenohedral, or Ditetragonal Alternating Class.

Space Groups in class: I42d, I42m, I4c2, I4m2, P421c, P421m, P42c, P42m, P4b2, P4c2, P4m2, and P4n2.

Example of the Tetragonal Scalenohedral class symmetry in stereo using JCrystal Applet by Steffen Weber.
Java Applet Not Started
Example of the Tetragonal scalenohedral class symmetry in stereo using Faces (version 3.5) by Georges Favreau.
Tetragonal -42m.gif

39 Minerals From the H-M Class Tetragonal - Scalenohedral (4 2 m)

Mineral Space Grp a c Z Vol (Ang3) Calc Dens
Akermanite P 421m 7.8400 5.0100 2 307.9 2.94
Alumoakermanite P 421m 7.7661 5.0297 2 303.4 2.94
Archerite I 42d 7.4480 6.9770 4 387.0 2.24
Bariopharmacosiderite I 42m 15.8500 16.0520 8 4032.6 3.14
Barium-zinc-alumopharmacosiderite I 42m 15.4760 15.6750 6 3754.3 1.83
Barquillite I 42m 5.4500 10.6000 2 314.9 4.64
Biphosphammite I 42d 7.4835 7.3400 4 411.1 1.94
Briartite I 42m 5.3200 10.5100 2 297.5 4.36
Cernyite I 42m 5.5330 10.8266 2 331.5 4.87
Chalcopyrite I 42d 5.2800 10.4100 4 290.2 4.20
Chatkalite P 4m2 7.6100 5.3730 1 311.2 4.97
Eskebornite I 42d 5.5180 11.0480 2 336.4 2.74
Famatinite I 42m 5.3853 10.7483 2 311.7 4.69
Ferrokesterite I 42m 5.4270 10.8710 2 320.2 4.48
Gallite I 42d 5.3500 10.4800 4 300.0 4.37
Gehlenite P 421m 7.6900 5.0670 2 299.6 3.04
Gonnardite I 42d 13.2100 6.6220 2 1155.6 2.32
Gugiaite P 421m 7.4300 5.0240 2 277.4 3.08
Hardystonite P 421m 7.8230 5.0130 2 306.8 3.40
Hocartite I 42m 5.7400 10.9600 2 361.1 4.77
Jasmundite I 42m 10.4610 8.8130 2 964.4 3.01
Kalborsite P 42m 9.8510 13.0600 2 1267.4 2.59
Kuramite I 42m 5.4450 10.7500 2 318.7 4.56
Laforetite I 42d 5.8800 11.2100 4 387.6 4.92
Luzonite I 42m 5.2900 10.4650 2 292.9 4.47
Mawsonite P 4m2 7.6030 5.3580 1 309.7 4.65
Melilite P 421m 7.7150 5.0990 2 303.5 2.94
Mooihoekite P 42m- 10.5810 5.3710 1 601.3 4.38
Okayamalite P 421m 7.1160 4.8150 2 243.8 3.29
Permingeatite I 42m 5.6300 11.2300 2 356.0 5.86
Pirquitasite I 42m 5.7860 10.8290 2 362.5 4.84
Renierite P 42c- 10.6226 10.5506 2 1190.5 4.62
Roquesite I 42d 5.5100 11.0500 4 335.5 4.80
Santarosaite I 42d; 11.5170 5.6320 12 747.0 3.97
Stalderite I 42m 9.8550 10.9370 4 1062.2 4.76
Stannite I 42m 5.4531 10.7470 2 319.6 4.47
Tetranatrolite I 42d 13.0200 6.6150 4 1121.4 2.25
Urea P 421m 5.6460 4.7010 2 149.9 1.33
Velikite I 42m 5.5550 10.9110 2 336.7 5.67

(* - Mineral Name is Not IMA Approved)
(! - New Dana Classification Number Has Been Changed or Added)
(? - IMA Discredited Mineral Species Name