chiral compound. The crystal structure is taken from PRL <b>101</b>, 247201 (2008), [[http://dx.doi.org/10.1103/PhysRevLett.101.247201]]. The spin wave model parameters are taken from PRL <b>106</b>, 207201 (2011), [[http://dx.doi.org/10.1103/PhysRevLett.106.207201]].</p><!--/introduction--><h2>Contents</h2><div><ul><li><a href="#1">Crystal structure</a></li><li><a href="#2">Chrality</a></li><li><a href="#3">Magnetic Hamiltonian</a></li><li><a href="#4">Magnetic structure</a></li><li><a href="#5">Alternativ