radtools.TRI.variation

property

property TRI.variation

Four variations of the Lattice.

\(\text{TRI}_{1a} k_{\alpha} > 90^{\circ}, k_{\beta} > 90^{\circ}, k_{\gamma} > 90^{\circ}, k_{\gamma} = \min(k_{\alpha}, k_{\beta}, k_{\gamma})\)

\(\text{TRI}_{1b} k_{\alpha} < 90^{\circ}, k_{\beta} < 90^{\circ}, k_{\gamma} < 90^{\circ}, k_{\gamma} = \max(k_{\alpha}, k_{\beta}, k_{\gamma})\)

\(\text{TRI}_{2a} k_{\alpha} > 90^{\circ}, k_{\beta} > 90^{\circ}, k_{\gamma} = 90^{\circ}\)

\(\text{TRI}_{2b} k_{\alpha} < 90^{\circ}, k_{\beta} < 90^{\circ}, k_{\gamma} = 90^{\circ}\)

Returns:

variationstr

Variation of the lattice. Either "TRI1a", "TRI1b", "TRI2a" or "TRI2b".