function T_23 = region23_Tcalc(p)
% Description:      Calculates the temperature at a given pressure for the
%                   boundary between regions 2 and 3 based upon the IAPWS
%                   IF-97 Release               
% -------------------------------------------------------------------------
% Syntax:           T_23 = region23_Tcalc(p)
%                   p           Pressure [MPa] 
% -------------------------------------------------------------------------
% Output:           T_23        Boundary temperature at p [K]    

n = region23_coeff;

T_23 = n(4) + sqrt((p - n(5)) / n(3));