MSE 503 Exam 2 || A+ Verified Solutions.
Solid-state physics focuses on studying __ and __ in crystals. correct answers crystals; electrons
A crystal is a __ periodic __ of __. correct answers 3-dimensional; array; atoms
In the early 1900s, Laue developed a theory of ___ of x-rays by a periodic __ of __. correct
answers diffraction; array; atoms
The experimental observation of __ by crystals proved that crystals are composed of a periodic
__ of __. correct answers X-ray diffraction; array; attoms
An ideal crystal is composed of the ___ repetition of __ structural units. correct answers infinite;
identical
The simplest crystals have structural repeat-units of __. correct answers a single atom
Examples of materials that form the simplest crystals are __, __ and __. correct answers copper;
silver; iron
Inorganic crystals have structural units that contain up to ___ atoms. correct answers 100
Protein crystals have structural units that contain up to ___ atoms. correct answers 10,000
Crystals are described by ___ with a ___ attached to each___. correct answers a lattice; group of
atoms; lattice point
A crystal structure is a combination of __ and __. correct answers a lattice; a basis
Atomic structure is based on the arrangement of __, and crystal structure is based on the
arrangement of __. correct answers electrons in an atom; atoms in a crystal
There are __ basic crystal structures. correct answers 7
In a Bravais point-lattice, the function of the translation vector is to __. correct answers describe
the periodicity of the structure
A point lattice is a __ construct of __. correct answers mathematical; periodic points in space
A point lattice defined by a set of __. correct answers translation vectors
What is the notation for a point in space? correct answers a,b,c or abc
In a crystal structure, the group of atoms attached to a lattice point is called the __. correct
answers basis
,In a crystal, the ___ is repeated in space to create the crystal ___. correct answers basis; structure
Lattice + basis = __. correct answers crystal structure
In a simple crystal like Cu, Ag or Fe, the structural unit is ___. correct answers a single atom
In an inorganic crystal, the structural unit can be up to ___ atoms or molecules. correct answers
100
In a protein crystal, the structural unit can be up to ___ atoms or molecules. correct answers
10000
The translation vectors in an ideal crystal are typically represented by ___. correct answers the
letters a,b,c
A lattice is ___ and ___ arrangement of ___ in ___. correct answers a regular; periodic; points;
space
A lattice is a set of points that are specified by the equation r' = ___, where r is a vector that
defines a given point in the lattice, and a,b,c are translation vectors, and the u,v,w can take any
integer value. correct answers r + ua + vb + wc
The crystal axes a,b,c form three adjacent edges of a ___. correct answers parallelepiped
In a lattice, a primitive cell has lattice points only __ the ___ of the cell. correct answers at;
corners
A lattice translation operation is defined as __ of a crystal __ itself by a crystal ___ vector.
correct answers displacement; parallel to; translation
A primitive cell is a __ cell. correct answers minimum volume
In a lattice, a pair of translation vectors are ___ if we arrive at all lattice points by ___
combinations of those two vectors. correct answers primitive; integral
To determine the Wigner-Seitz __ cell, we draw lines to connect a given lattice point to all
nearby lattice points; at the midpoint of each such line, draw a __ line or plane. The __ volume
that is enclosed in this way is the Wigner-Seitz __ cell. correct answers primitive; normal;
smallest; primitive
A crystal lattice can have __-fold symmetries, but not __-fold symmetries. correct answers
(1,2,3,4,6); (5,7)
A lattice ___ is the collection of symmetry operations which (when applied about a ___) leave
the lattice ___. correct answers point group; lattice point; invariant
, Symmetry operations include __, __ and __ operations. correct answers rotation; mirror
reflections; inversion
A cube has __ four-fold axes of symmetry. correct answers 3
A cube has __ three-fold axes of symmetry. correct answers 4
A cube has __ two-fold axes of symmetry. correct answers 6
The structure SC is a __ with __. correct answers Simple cubic lattice; an atom at 000
The stucture BCC is a __ with __. correct answers body-centered cubic lattice; an atom at 000
The stucture FCC is a __ with __. correct answers face-centered cubic lattice; an atom at 000
The structure HCP is a __ lattice with an atom at __ and an atom at __. correct answers primitive
hexagonal; 000, 1/3, 2/3, 1/2; 000, 2/3, 1/3, 1/2
The NaCl structure is a __ lattice with atoms at __. correct answers FCC; A 000, B ½ ½ ½
The CsCl structure is a __ lattice with atoms at __. correct answers SC; Cs 000, Cl ½ ½ ½
The diamond structure is a __ lattice with atoms at __. correct answers FCC; C 000, C 1/4 1/4
1/4
Describe the following structures: ZnS. correct answers FCC; Zn 000, S 1/4 1/4 1/4
A basis is __ that __ each lattice point. correct answers a motif of atoms; reside on
What notation is used to describe atomic position? correct answers a,b,c or abc
How many lattice points are in the FCC unit cell? correct answers 4
How many lattice points are in the BCC unit cell? correct answers 2
How many lattice points are in the SC unit cell? correct answers 1
How many lattice points are in the Hexagonal unit cell? correct answers 1
How many lattice points are in the diamond structure? correct answers 8
The atomic bonds in halides, oxides and silicates tend to be primarily ___ in nature. correct
answers ionic
In crystals that are primarily __ in bond character, the structure is determined by packing the ions
to maximize __ and minimize __. correct answers ionic; attractive forces; repulsice forces
Solid-state physics focuses on studying __ and __ in crystals. correct answers crystals; electrons
A crystal is a __ periodic __ of __. correct answers 3-dimensional; array; atoms
In the early 1900s, Laue developed a theory of ___ of x-rays by a periodic __ of __. correct
answers diffraction; array; atoms
The experimental observation of __ by crystals proved that crystals are composed of a periodic
__ of __. correct answers X-ray diffraction; array; attoms
An ideal crystal is composed of the ___ repetition of __ structural units. correct answers infinite;
identical
The simplest crystals have structural repeat-units of __. correct answers a single atom
Examples of materials that form the simplest crystals are __, __ and __. correct answers copper;
silver; iron
Inorganic crystals have structural units that contain up to ___ atoms. correct answers 100
Protein crystals have structural units that contain up to ___ atoms. correct answers 10,000
Crystals are described by ___ with a ___ attached to each___. correct answers a lattice; group of
atoms; lattice point
A crystal structure is a combination of __ and __. correct answers a lattice; a basis
Atomic structure is based on the arrangement of __, and crystal structure is based on the
arrangement of __. correct answers electrons in an atom; atoms in a crystal
There are __ basic crystal structures. correct answers 7
In a Bravais point-lattice, the function of the translation vector is to __. correct answers describe
the periodicity of the structure
A point lattice is a __ construct of __. correct answers mathematical; periodic points in space
A point lattice defined by a set of __. correct answers translation vectors
What is the notation for a point in space? correct answers a,b,c or abc
In a crystal structure, the group of atoms attached to a lattice point is called the __. correct
answers basis
,In a crystal, the ___ is repeated in space to create the crystal ___. correct answers basis; structure
Lattice + basis = __. correct answers crystal structure
In a simple crystal like Cu, Ag or Fe, the structural unit is ___. correct answers a single atom
In an inorganic crystal, the structural unit can be up to ___ atoms or molecules. correct answers
100
In a protein crystal, the structural unit can be up to ___ atoms or molecules. correct answers
10000
The translation vectors in an ideal crystal are typically represented by ___. correct answers the
letters a,b,c
A lattice is ___ and ___ arrangement of ___ in ___. correct answers a regular; periodic; points;
space
A lattice is a set of points that are specified by the equation r' = ___, where r is a vector that
defines a given point in the lattice, and a,b,c are translation vectors, and the u,v,w can take any
integer value. correct answers r + ua + vb + wc
The crystal axes a,b,c form three adjacent edges of a ___. correct answers parallelepiped
In a lattice, a primitive cell has lattice points only __ the ___ of the cell. correct answers at;
corners
A lattice translation operation is defined as __ of a crystal __ itself by a crystal ___ vector.
correct answers displacement; parallel to; translation
A primitive cell is a __ cell. correct answers minimum volume
In a lattice, a pair of translation vectors are ___ if we arrive at all lattice points by ___
combinations of those two vectors. correct answers primitive; integral
To determine the Wigner-Seitz __ cell, we draw lines to connect a given lattice point to all
nearby lattice points; at the midpoint of each such line, draw a __ line or plane. The __ volume
that is enclosed in this way is the Wigner-Seitz __ cell. correct answers primitive; normal;
smallest; primitive
A crystal lattice can have __-fold symmetries, but not __-fold symmetries. correct answers
(1,2,3,4,6); (5,7)
A lattice ___ is the collection of symmetry operations which (when applied about a ___) leave
the lattice ___. correct answers point group; lattice point; invariant
, Symmetry operations include __, __ and __ operations. correct answers rotation; mirror
reflections; inversion
A cube has __ four-fold axes of symmetry. correct answers 3
A cube has __ three-fold axes of symmetry. correct answers 4
A cube has __ two-fold axes of symmetry. correct answers 6
The structure SC is a __ with __. correct answers Simple cubic lattice; an atom at 000
The stucture BCC is a __ with __. correct answers body-centered cubic lattice; an atom at 000
The stucture FCC is a __ with __. correct answers face-centered cubic lattice; an atom at 000
The structure HCP is a __ lattice with an atom at __ and an atom at __. correct answers primitive
hexagonal; 000, 1/3, 2/3, 1/2; 000, 2/3, 1/3, 1/2
The NaCl structure is a __ lattice with atoms at __. correct answers FCC; A 000, B ½ ½ ½
The CsCl structure is a __ lattice with atoms at __. correct answers SC; Cs 000, Cl ½ ½ ½
The diamond structure is a __ lattice with atoms at __. correct answers FCC; C 000, C 1/4 1/4
1/4
Describe the following structures: ZnS. correct answers FCC; Zn 000, S 1/4 1/4 1/4
A basis is __ that __ each lattice point. correct answers a motif of atoms; reside on
What notation is used to describe atomic position? correct answers a,b,c or abc
How many lattice points are in the FCC unit cell? correct answers 4
How many lattice points are in the BCC unit cell? correct answers 2
How many lattice points are in the SC unit cell? correct answers 1
How many lattice points are in the Hexagonal unit cell? correct answers 1
How many lattice points are in the diamond structure? correct answers 8
The atomic bonds in halides, oxides and silicates tend to be primarily ___ in nature. correct
answers ionic
In crystals that are primarily __ in bond character, the structure is determined by packing the ions
to maximize __ and minimize __. correct answers ionic; attractive forces; repulsice forces
