Trigonal Pyramidal Class

Trigonal Pyramidal Class
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Trigonal Pyramidal Class

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Axial Configuration Paper Model

Trigonal - Pyramidal Class (3)  Mineral Species Listing

System Class Name

AXES

 Planes Center
Hermann-
Maugin
Symbols
2-Fold 3-Fold 4-Fold 6-Fold
Trigonal Pyramidal - 1 - - - - 3

Synonyms: Trigonal Tetartohedral Hemimorphic Class, Sodium Periodate Type, or Trigonal Polar Class.

Space Groups in class: P3, P31, P32, and R3.

Example of the Trigonal - pyramidal class symmetry in stereo using JCrystal Applet by Steffen Weber.

Java Applet Not Started
Example of the Trigonal - pyramidal class symmetry in stereo using Faces (version 3.5) by Georges Favreau.
Trigonal 3.gif (3267 bytes)
 
40 Minerals From the H-M Class Trigonal - Pyramidal (3)
Mineral Space Grp a c Z Vol (Ang3) Calc Dens
Aktashite R 3 13.7200 9.3200 3 1519.3 5.47
Averievite P 3 6.3750 8.3990 1 295.6 4.01
Bechererite P 3 8.3220 7.3760 1 442.4 3.50
Belovite-(Ce) P 3 9.6920 7.2010 2 585.8 4.23
Benstonite R 3 18.2800 8.6700 3 2509.0 3.61
Biachellaite P 3 12.9130 79.6050 16 11495.4 2.71
Bottinoite P 3 16.0450 9.7840 6 2181.4 2.81
Brandholzite P 3 16.1140 9.8630 6 2217.9 4.62
Cappelenite-(Y) P 3 10.6700 4.6800 1 461.4 4.84
Carlinite R 3 12.1200 18.1750 27 2312.1 8.55
Deloneite-(Ce) P 3 9.5100 7.0100 2 549.1 3.84
Diversilite-(Ce) R 32 10.7080 60.0730 6 5965.2 3.80
Dixenite R 3 8.2330 37.4900 3 2200.7 4.36
Franciscanite-III P 3 8.1480 4.8040 1 276.2 4.29
Franciscanite-VIII P 3 8.1480 4.8040 2 276.2 3.99
Ganomalite P 3 9.8200 10.1300 1 846.0 5.69
Gordaite P 3 8.3630 13.0180 2 788.5 2.64
Gruzdevite R 3 13.9000 9.4320 3 1578.2 5.85
Hematolite R 3 8.2750 36.6000 3 2170.4 3.37
Holfertite P 3 10.8240 7.5490 3 765.9 4.22
Ilimaussite-(Ce) R 32 10.7700 61.0500 3 6132.7 3.45
IMA2009-001 R 3 9.1202 102.1450 3 7358.0 3.11
Jarosite R 3 7.2100 17.0300 3 766.7 3.25
Kelyanite P 3 13.5600 10.0040 3 1593.0 8.68
Kuzelite R 3 5.7600 53.6600 3 1541.8 2.01
Nowackiite R 3 13.4400 9.1700 3 1434.5 4.38
Oneillite R 3 14.1920 29.9830 3 5229.9 2.98
Orebroite-III P 3 8.1830 4.7560 1 275.8 4.55
Orebroite-VIII P 3 8.1830 4.7560 2 275.8 4.61
Parisite-(Ce) R 3 7.1248 14.0175 3 616.2 4.34
Parisite-(Nd) R 3 7.1250 14.0180 3 616.3 4.49
Rontgenite-(Ce) R 3 7.1300 69.4000 9 3055.4 4.19
Sheldrickite P 32 6.7180 15.0500 3 588.2 2.86
Simpsonite P 3 7.3770 4.5140 1 212.7 6.35
Stavelotite-(La) P 31 11.5250 33.3470 3 3835.9 4.47
Stillwellite-(Ce) P 31 6.8440 6.7000 3 271.8 4.51
Voronkovite R 3 14.2050 30.2650 3 5288.8 2.94
Welinite-III P 3 8.1550 4.7850 1 275.6 5.42
Welinite-VIII P 3 8.1550 4.7850 2 275.6 4.85
Zussmanite R 3 11.6500 28.6880 3 3372.0 3.17

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