code: def define_Precip(self, diameter, density, molecweight, alumMPM):
          
          self.PrecipDiameter = diameter
          self.PrecipDensity = density
          self.PrecipMolecWeight = molecweight
          self.PrecipAluminumMPM = alumMPM
docs: Define a precipitate for the chemical.
  
          :param diameter: Diameter of the precipitate in particulate form
          :type diameter: float
          :param density: Density of the material (mass/volume)
          :type density: float
          :param molecWeight: Molecular weight of the material (mass/mole)
          :type molecWeight: float
          :param alumMPM: