MSE 280 Crystal Structures
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35 Terms
How many atoms are in a simple cubic structure per unit cell?
1
What is the close-packed direction in a simple cubic structure?
<100>
What is the densest plane in a simple cubic structure?
{100}
What is the coordination number of a simple cubic structure?
6
What is the atomic packing factor (APF) of a simple cubic structure?
52%
How many atoms are in a Body-Centered Cubic (BCC) unit cell?
2 atoms
What is the close-packed direction in a Body-Centered Cubic (BCC) structure?
<111>
What is the densest plane in a Body-Centered Cubic (BCC) structure?
{110}
What is the coordination number in a Body-Centered Cubic (BCC) structure?
8
What is the Atomic Packing Factor (APF) for a Body-Centered Cubic (BCC) structure?
68%
How many atoms are in a Face-Centered Cubic (FCC) unit cell?
4 atoms
What is the close-packed direction in a Face-Centered Cubic (FCC) structure?
<110>
What is the densest plane in a Face-Centered Cubic (FCC) structure?
{111}
What is the coordination number of a Face-Centered Cubic (FCC) structure?
12
What is the Atomic Packing Factor (APF) of a Face-Centered Cubic (FCC) structure?
74%
What is the Atomic Packing Factor (APF) of a Hexagonal Close-Packed (HCP) structure?
74%
What is the coordination number of a Hexagonal Close-Packed (HCP) structure?
12
What is the densest plane in a Hexagonal Close-Packed (HCP) structure?
{0001}
What is the APF of a Diamond Cubic ionic crystal structure?
34%
How many atoms are in a Diamond Cubic structure per unit cell?
8
What is a Diamond cubic structure made up of?
FCC plus ½ tetrahedral sites filled
Which crystal structures are elemental?
Simple Cubic, Body-Centered Cubic, Face-Centered Cubic, Diamond Cubic
Which crystal structures are non-elemental (contain two different atoms)?
Zinc blende, Rock salt, Cesium chloride, Perovskite
What is the coordination number of a Zinc blende ionic crystal structure?
6
What is the coordination number of a Rock salt ionic crystal structure?
6
What is the coordination number of a Cesium chloride ionic crystal structure?
8