Tetragonal Ditetragonal Pyramidal Class (original) (raw)

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Axial Configuration Paper Model

Tetragonal - Ditetragonal Pyramidal Class (4 m m) Mineral Species Listing

System Class Name AXES Planes Center Hermann- Maugin Symbols
2-Fold 3-Fold 4-Fold 6-Fold
Tetragonal Ditetragonal pyramidal - - - - 4 - 4mm

Synonyms: Hemimorphic Class, Iodosuccinimide Type, Holohedral Hemimorphic, or Ditetragonal Polar Class.

Space Groups in class: I41cd, I41md, I4cm, I4mm, P42bc, P42cm, P42mc, P42nm, P4bm, P4cc, P4mm, and P4nc.

Example of the Tetragonal Ditetragonal-pyramidal class symmetry in stereo using JCrystal Applet by Steffen Weber.
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Example of the Tetragonal Ditetragonal-pyramidal class symmetry in stereo using Faces (version 3.5) by Georges Favreau.
Tetragonal_4mm.gif (5550 bytes)

15 Minerals From the H-M Class Tetragonal - Ditetragonal Pyramidal (4 m m)

Mineral Space Grp a c Z Vol (Ang3) Calc Dens
Adranosite I 41/acd 18.1180 11.3200 3715.9
Diaboleite P 4mm 5.8700 5.4940 1 189.3 5.41
Diomignite I 41cd 9.4700 10.2790 8 921.8 2.44
Fresnoite P 4bm 8.5291 5.2110 2 379.1 4.44
Hematophanite P 4mm 3.9200 15.3100 1 235.3 8.09
Horomanite P 4/mmm 8.7070 10.4390 791.4
IMA2008-035 I 41/amd 6.9746 6.2055 4 301.9 5.11
Lenaite P 42mc 5.4371 10.8479 4 320.7 4.72
Nielsenite P 4mm 3.7125 25.6200 4 353.1 5.56
Niveolanite P 4/mcc 13.0870 5.4040 8 925.5 2.05
Routhierite I 4mm 9.9770 11.2900 4 1123.8 5.72
Samaniite P 41/mmm 10.0890 10.4020 1058.8
Wakefieldite-(La) I 41/amd 7.4060 6.5040 4 356.7 4.72
Wakefieldite-(Nd) I 41/amd 7.3380 6.5090 4 350.5 4.91
Zhangpeishanite P 4/mmm 4.3951 7.2230 2 139.5 4.54

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