CRYSTAL SYSTEMS Flashcards by OB AJAYI | Brainscape

Q

what are the crystal systems

A

one of several classes of lattices for crystals

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Q

the 7 crystal systems

A

isometric(cubic)
tetragonal
orthorhombic
hexagonal
triclinic
monoclinic
rhombohedral (trigonal)

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Q

7 crystal systems: isometric(cubic)

A

all 3 axes equal in length

all axes perpendicular to each other

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Q

7 crystal systems: tetragonal

A

2 of 3 axes equal in length

all axes perpendicular to each other

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Q

7 crystal systems: orthorhombic

A

all 3 axes unequal in length

all axes perpendicular to each other

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Q

7 crystal systems: hexagonal

A

4 axes with 3 equal in length

separate by equal angels/lie in same plane

4th axis perpendicular to plane of other 3 axis

hexagonal cells have lattice points in each of 2 six-sided faces

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Q

7 crystal systems: triclinic

A

all 3 axes unequal in length

none perpendicular to each other

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Q

7 crystal systems: monoclinic

A

all 3 axes unequal in length

2 perpendicular to each other

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Q

7 crystal systems: rhombohedral (trigonal)

A

all 3 axes unequal in length

all axes perpendicular to each other

crystal faces all have same size and shape

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