- tetragonal-dipyramidal class
- крист. тетрагонально-дипирамидальный класс
The New English-Russian Dictionary of Radio-electronics. F.V Lisovsky . 2005.
tetragonal-dipyramidal class
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Metazeunerite — crystals to 7 mm on smoky quartz, Erongo Region, Namibia General Category … Wikipedia
Crystal system — Diamond crystal structure consists of face centered cubic lattice. In crystallography, the terms crystal system, crystal family, and lattice system each refer to one of several classes of space groups, lattices, point groups, or crystals.… … Wikipedia
scapolite group — noun : a group of minerals crystallizing in the dipyramidal class of the tetragonal system, being white or grayish white in color when pure, and consisting essentially of silicates of aluminum, calcium, and sodium (hardness 5 6.5, specific… … Useful english dictionary
