It is a gray white metallic mineral crystallizing in the hexagonal system.
2.
Kamiokite is a hexagonal system with equal axes a 1, a 2, a 3.
3.
Greenockite crystallizes in the hexagonal system.
4.
In monoclinic, rhombohedral, tetragonal, and trigonal / hexagonal systems there is one unique axis ( sometimes called the "'principal axis "') which has higher rotational symmetry than the other two axes.
5.
?-quartz crystallizes in the trigonal crystal system, space group " P " 3 1 21 and " P " 3 2 21 respectively . ?-quartz belongs to the hexagonal system, space group " P " 6 2 22 and " P " 6 4 22, respectively.
6.
"I am trying to derive an ordinary hexagonal system based on the phase-space of that damn Philadelphia pepper pot you've gone and erected out by Bug River on Route 6, " the actor David Greenspan is called upon to declare in characteristic Wellmanian ( Wellmaniacal ? ) fashion.
7.
NO 2 [ Zr ( NO 3 ) 3.3H 2 O ] 2 ( NO 3 ) 3 crystallizes in the hexagonal system, space group PC1 with unit cell dimensions a = 10.292?b = 10.292?c = 14.84?volume 1632.2?3 with 2 formulae per cell, density = 2.181.
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