Tetragonal Dipyramidal Class

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Axial Configuration	Paper Model

Tetragonal - Dipyramidal Class (4/m) Mineral Species Listing

System	Class Name	AXES				Planes	Center	Hermann- Maugin Symbols
		2-Fold	3-Fold	4-Fold	6-Fold
Tetragonal	Dipyramidal	-	-	1	-	1	yes	4/m

Synonyms: Scheelite Type, Pyramidal Hemihedral, or Tetragonal Equatorial Class.

Space Groups in class: I4/m, I4₁/a, P4/m, P4/n, P4₂/m, and P4₂/n.

Example of the Tetragonal dipyramidal class symmetry in stereo using JCrystal Applet by Steffen Weber.

Java Applet Not Started

Example of the Tetragonal dipyramidal class symmetry in stereo using Faces (version 3.5) by Georges Favreau.

**60 Minerals From the H-M Class Tetragonal - Dipyramidal (4/m)**
Mineral	Space Grp	a	c	Z	Vol (Ang3)	Calc Dens
Ammonioleucite	I 4₁/a	13.2140	13.7130	16	2394.4	2.25
Ankangite	I 4/m	10.1390	2.9610	1	304.4	4.38
Arsenuranospathite	P 4₁/n	7.1600	30.3700	1	1556.9	2.54
Ashburtonite	I 4/m	14.2340	6.1030	2	1236.5	4.66
Baotite	I 4₁/a	20.0200	6.0060	4	2407.2	4.37
Bariosincosite	P 4/n or P 4/nmm	9.0310	12.7550	4	1040.3	3.40
Bellidoite	P 4₁/m	11.5200	11.7400	32	1558.0	7.03
Braggite	P 4₁/m	6.3800	6.5700	8	267.4	9.28
Chantalite	I 4₁/a	4.9520	23.2750	4	570.8	2.96
Fergusonite-(Ce)	I 4₁/a	5.1700	5.3000	2	141.7	6.96
Fergusonite-(Nd)	I 4₁/a			4
Fergusonite-(Y)	I 4₁/a	7.7400	11.3400	8	679.4	4.81
Formanite-(Y)	I 4₁/a	7.7500	11.4100	9	685.3	7.28
Garronite	I 4₁/a	9.8730	10.2880	1	1002.8	2.19
Henrymeyerite	I 4/m	10.2190	2.9630	1	309.4	4.21
Jeanbandyite	P 4₁/n	7.6480	7.6480	4	447.4	3.67
Julienite	P 4₁/n	9.2400	5.5700	1	475.6	1.68
Kafehydrocyanite	I 4₁/a	9.3940	33.7200	8	2975.7	1.89
Kahlerite	P 4₁/n	14.3000	21.9700	8	4492.7	3.17
Leucite	I 4₁/a	13.0900	13.7500	16	2356.0	2.46
Lingunite	I 4/m	9.2630	2.7060	2	232.2	3.87
Manganvesuvianite	P 4/n	15.5720	11.8240	2	2867.2	3.42
Manjiroite	I 4/m	9.9160	2.8640	1	281.6	4.36
Mannardite	I 4₁/a	14.3560	5.9110	4	1218.2	4.36
Marialite	I 4/m	12.0750	7.5160	2	1095.9	2.56
Meionite	P 4/m	12.2600	7.6100	2	1143.8	2.71
Metalodevite	P 4₁/m	7.1600	17.2000	2	881.8	4.01
Metanovacekite	P 4/n	7.1600	8.5800	1	439.9	3.59
Metatorbernite	P 4/n	6.9690	17.3060	2	840.5	3.70
Metazeunerite	P 4/n	7.1000	17.4200	2	878.1	3.88
Mopungite	P 4₁/n	7.9940	7.8590	4	502.2	3.26
Narsarsukite	I 4/m	10.7400	7.9000	4	911.3	2.82
Novacekite	P 4₁/n	7.1100	20.0600	2	1014.1	3.47
Novodneprite	I 4/2m	11.9540	5.8900	8	841.7	12.92
Paceite	I 4/m	11.1550	16.2360	4	2020.3	1.47
Paraniite-(Y)	I 4₁/a	5.1350	33.8820	4	893.4	5.97
Polhemusite	P 4/n	8.7100	14.7400	24	1118.2	4.68
Powellite	I 4₁/a	5.2300	11.4400	4	312.9	4.25
Priderite	I 4/m	10.1100	2.9640	1	303.0	3.92
Redledgeite	I 4₁/a	14.3200	5.8930	4	1208.4	4.41
Reidite	I 4₁/a	4.7380	10.5060	4	235.9	5.16
Rhodostannite	I 4₁/a	7.2900	10.3100	2	547.9	5.16
Rosenbergite	P 4/n	7.7150	3.6480	2	217.1	2.40
Sarcolite	I 4/m	12.3430	15.4630	4	2355.8	2.66
Scapolite	P 4₁/n	12.0500	7.5800	2	1100.6	2.65
Scheelite	I 4₁/a	5.2420	11.3720	4	312.5	6.12
Schwertmannite	P 4/m	10.6600	6.0400	1	686.4	3.74
Silvialite	I 4/m	12.1340	7.5760	2	1115.4	2.80
Stolzite	I 4₁/a	5.4600	12.0500	4	359.2	8.41
Stottite	P 4₁/n	7.5940	7.4880	4	431.8	3.55
Tetrarooseveltite	I 4₁/a	5.0850	11.6900	4	302.3	7.64
Tetrawickmanite	P 4₁/n	7.7870	7.7970	4	472.8	3.87
Toyohaite	I 4₁/a	7.4640	10.8000	2	601.7	4.88
Vernadite	I 4/m	9.8660	2.8440	4	276.8	2.60
Vesuvianite	P 4/n	15.5040	11.8080	4	2838.3	3.33
Vlodavetsite	I 4/m	6.8560	13.3250	2	626.3	2.36
Vysotskite	P 4₁/m	6.3710	6.5400	5	265.5	3.96
Weddellite	I 4/m	12.3300	7.3530	8	1117.9	1.95
Wiserite	P 4/n	20.1920	3.2810	7	1337.7	3.46
Wulfenite	I 4₁/a	5.4350	12.1100	4	357.7	6.82

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

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