Pengaruh penambahan serbuk talc dengan kadar 1,0%, 2,0%, 3,0%, 4,0% pada serbuk alumina terhadap pola difraksi Sinar-X untuk penentuan efektivitas parameter pengukuran peralatan X-Ray Diffraction (XRD) Phillips Generator PW1830 = Effect of addition talc powder grading 1.0%, 2.0% 3.0%, and 4.0% Upon Alumina Powder to X-Ray Diffraction Pattern for Determination of Effectiveness Equipment Measurement parameter of X-Ray Diffraction (XRD) Phillips Generator PW1830