The accuracy of Braginskii's transport coefficients for a Lorentz plasma

Transport coefficients appropriate to Ohm's Law and electron heat flow are derived for a Lorentz plasma. Their values are calculated directly from a cartesian tensor expansion of the electron distribution function without the use of Laguerre polynomials. Significant inaccuracies are found in Braginskii's thermoelectric and heat flow coefficients, for certain values of omega tau (where omega is the electron cyclotron frequency and tau its mean collision time with ions).