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level: Crystals, crystal structure and patterns

Questions and Answers List

level questions: Crystals, crystal structure and patterns

Question	Answer
What is the name of the process of growth whereby the bonding of atoms forms a crystal structure?	Crystallisation
What is the name for a material that contains many crystal grains?	Polycrystalline
What is the name for a material that is made up from one or more pieces or grains of crystal solid?	Crystalline
What is the name for a material where the individual crystalline pieces can only be seen under a microscope?	Microcrystalline
How many different types of crystal symmetry are there?	7
What is the name of this crystal system that has an identical pattern repeated in 3 directions, all at 90 degrees to eachother?	Cubic
What is the name of this crystal system that has an identical pattern in two directions, and a different pattern in the third direction, all at 90 degrees to eachother?	Tetragonal
What is the name of this crystal system that has an identical pattern in three directions at 120 degrees to eachother, and one different pattern in a fourth direction at 90 degrees to the previous axes in a direction of three-fold symmetry?	Trigonal
What is the name of this crystal system that has an identical pattern in three directions at 120 degrees to eachother, and one different pattern in a fourth direction at 90 degrees to the previous axes in a direction of six-fold symmetry?	Hexagonal
What is the name of this crystal system that has three different patterns in three different directions, all at 90 degrees to eachother?	Orthorhombic
What is the name of this crystal system that has three different patterns in different directions, where one direction is greater than 90 degrees to the other two, and one is at 90 degrees to the other two?	Monoclinic
What is the name of this crystal system that has three different patterns in different directions, where none of the angles of axis are at 90 degrees to eachother?	Triclinic
Which crystal system does this rough crystal belong to?	Cubic
What crystal system does this rough crystal belong to?	Tetragonal
What is the name of the crystal system this rough gem belongs to?	Trigonal
What is the name of the crystal system this rough crystal belongs to?	Hexagonal
Which crystal system does this rough crystal beong to?	Orthorhombic
What is the crystal system that this rough gem belongs to?	Monoclinic
What is the crystal system that this rough crystal belongs to?	Triclinic
What crystal system do diamonds, garnets, fluorite and spinel belong to?	Cubic
What crystal system does zircon belong to?	Tetragonal
What crystal system does quartz, tourmaline and corundum belong to?	Trigonal
What crystal system does beryl belong to?	Hexagonal
Which crystal system does topaz, peridot, iolite and tanzanite belong to?	Orthorhomic
Which type of material does not have optical or non-optical properties?	Amorphous
What is the term for a regularly repeating pattern seen within a crystal structure?	Lattice