Chapter/Index: Introduction | A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
Appendix
Pbcm (57) Space Group
| Table 1888. Pbcm (57) space group.
Name in the International Tables for Crystallography |
Pbcm |
|
P |
|
47 |
|
mmm |
Crystal system |
Orthorhombic |
|
mmm |
Asymm |
0 ≤ x ≤ 1/2 and 0 ≤ y ≤ 1 and 0 ≤ z ≤1/4 |
|
8 |
Crystal symmetry |
Is centrosymmetric because it has -x,-y,-z in its symmetry. |
Symmetry (atomic coordinates) |
X, Y, Z;
-X, -Y, 1/2+Z;
-X, 1/2+Y, 1/2-Z;
X, 1/2-Y, -Z;
-X, -Y, -Z;
X, Y, 1/2-Z;
X, 1/2-Y, 1/2+Z;
-X, 1/2+Y, Z |
Crystal examples |
β-PbO.
Er(HPO4)(NO3)·3 H2O: a = 10.1653 Å, b = 11.9178 Å, c = 6.8533 Å, V = 830.26, Z = 4. |
|
