1# -*- coding: utf-8 -*-
2"""
3"""
4from __future__ import absolute_import
5
6from ._utils import _cd
7from ..unitquantity import UnitConstant
8
9
10Angstrom_star = UnitConstant(
11    'Angstrom_star',
12    _cd('Angstrom star'),
13    symbol='A*',
14    u_symbol='Å*'
15)
16d_220 = a_Si_220 = silicon_220_lattice_spacing = UnitConstant(
17    'silicon_220_lattice_spacing',
18    _cd('{220} lattice spacing of silicon'),
19    symbol='d_220',
20    u_symbol='d₂₂₀'
21)
22Cu_x_unit = UnitConstant(
23    'Cu_x_unit',
24    _cd('Cu x unit'),
25    symbol='CuKalpha_1',
26    u_symbol='CuKα₁'
27)
28a = a_Si_100 = lattice_parameter_of_silicon = UnitConstant(
29    'lattice_parameter_of_silicon',
30    _cd('lattice parameter of silicon')
31)
32Mo_x_unit = UnitConstant(
33    'Mo_x_unit',
34    _cd('Mo x unit'),
35    symbol='MoKalpha_1',
36    u_symbol='MoKα₁'
37)
38
39del UnitConstant, _cd
40