Term

Definition
pyrite chromite ilmenite magnetite chalcopyrite 


Term

Definition
minerals with densely packed atoms
minerals with high Z atoms
minerals with higher degree of covalent bonding 


Term

Definition
unit cell dimensions are of different lengths and any axis may be the longest. b and c are at 90°; a and b are at 90°; a and c are not at 90° 


Term

Definition
unit cell dimensions are of different lengths. all angles between the axes are 90° 


Term

Definition
a and b are of the same length, c is different. all angles between the axes are 90° 


Term

Definition
a and b are of the same length, c is different. angles between a and c and b and c are 90°. the angle between a and b is 120° 


Term

Definition
all axes are of the same length. all angles between the axes are 90° 


Term

Definition
motifs, including crystal faces or particular atomic arrangements, that are repeated about a point 


Term

Definition
repetition of a motif by a set of uniform rotations about an axis 


Term

Definition
symmetry with respect to a center point 


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Definition
combination of rotation axes with inversion 


Term

Definition
crystal faces make simple intercepts on crystal axes 


Term

Definition
common crystal faces are parallel to lattice planes that have high lattice node density 

