/**
  * @param {Vector2} position
  * @param {number} angle
  *
  * @constructor
  */
 function SodiumNitrateCrystal( position, angle ) {
   Crystal.call( this, Formula.SODIUM_NITRATE, position, new Sodium().radius * 2 + SodiumNitrateConstants.NITROGEN_OXYGEN_SPACING, angle );
 }
 /**
  *
  * @param {Vector2} position
  * @param {number} angle
  * @constructor
  */
 function CalciumChlorideCrystal( position, angle ) {
   Crystal.call( this, Formula.CALCIUM_CHLORIDE, position, new Calcium().radius + new Chloride().radius, angle );
 }