Lattice constants
a = Å, b = Å, c = Å
α = deg., β = deg., γ = deg.


Reflection condition
none H+K=2n H+L=2n K+L=2n H+K+L=2n H,K,L all even or all odd -H+K+L=3n

Orientation
u = (,,)
v = (,,)
(u: direction parallel to incident beam.
v: another direction in the beam horizontal plane.)


q-vectors
q₁ = (,,), show indices
q₂ = (,,), show indices
q₃ = (,,), show indices

λ min

Å

Free rotation
deg.
deg.
deg.
Set the current orientation as "ω= deg"
(ω-rot. direction CCW CW)

ω rotation
Current ω: 0 deg.
Go to ω= deg

(H_t,K_t,L_t)=(,,)
|Q|(=2π/d) = A^-1
λ = Å
2θ = deg
2θ_h = deg (on horizontal plane)
2θ_v = deg (take-off)
Azimuth = deg

	Qx									H
	Qy		=							K
	Qz									L

(Q_z is parallel to k_i. Q_y is vertical.)

Horizontal:
Vertical:

Reflection	2θ (deg)	Azimuth (deg)
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