a Institut für Mineralogie, Petrologie und Kristallographie, Universität Marburg, Hans-Meerwein-Strasse, D-35032 Marburg, Germany
Metrical conditions: a, b, c, β arbitrary; α = γ = 90°
Bravais lattice types: mP, mC or mA or mI
Symmetry of lattice points: .2/m.
Simplified formulae: