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"Analisis Rielveld dengan program EXPGUI-GSAS dapat digunakan untuk meneliti kekristalan material. Pada penelitian dilakukan penghalusan parameter-parameier struktur liga sampel film tipis PIZT diatas subslrat Pi (200)/Si(VSi(tOO) dengan variasi doping indium, didapat indikator keberhasilan R-pola (Rp) pada selang (5,77-10,36)%, R-pola dengan pemberat (wRp) pada selang aniara (8,59-15,35)% dan Goodness of fit (GoF) pada selang antara 1,036-5,462. Indikator yang didapal secara fisik dapat ditandai dengan miripnya kurva kalkulasi dengan kurva eksperimen. Semua sampel PIZT substrat Pt menunjukkan sistem kristal kubik dengan grup ruang Fm3m. Selain itu didapat nilai parameier kisi hasil penghalusan yang mendekati nilai pada international Centre for Diffraction Data (ICDD).

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We have use Rietveld analysis on EXPGUI-GSAS plalform to examine the crystalinity of PIZT on Pt Substrate. In this experiment, we have used 3 samples of PIZT thin film in the platinum substrate with variation on the percentage of indium doping. The value of efficacy indicator for 3 specimens included R-Pattern (Rp) between (5,77-10,36)%, weighted of R-Pattern ( wRp) between ( 8,59-15.35)% and Goodness of Fit (GoF) between 1,036-5,462. The value of efficacy indicator marked physically as alike between the calculated curve and experiment curve. Most of the sample of PIZT thin films in platinum substrate show that the crystal structure are cubic with space group Fm3m and lallice parameter near the value on the Powder Diffraction Data-International Center for Diffraction Data."

"Sampel Nd2Fe14B yang berupa bubuk dan berwama hitam telah diperiksa dengan difraksi sinar-x pada temperatur 299,7 K. Data hasil difraksi sinar-x tersebut dianalisis dengan analisis Rietveld untuk memperhalus parameter-parameter mikronya. Sebanyak 25 parameter telah diperhalus, yaitu: koordinat atom (12), koefisien puncak FWHM (3), konstanta kisi (2), faktor skala (I), titik nol (1), latar belakang (4), orientasi yang disukai (1) dan bentuk puncak (1). Struktur kristal Nd2Fe14B adalah tetragonal (grup ruang P42/mnm) dengan konstanta kisi a = b = 8,782 Ǻ , dan c = 12,146 Ǻ , orientasi yang disukai pada bidang refleksi (331) di 2θ = 52°. Dengan koordinat atom hasil penghalusan tersebut dicari jarak rata-rata atom tetangga terdekat (rave) setiap posisi, hasil tersebut digunakan untuk menghitung momen magnetik lokal (mi), diperoleh m Nd(4f) = 1,81 µB, m Nd(4g) = 2,79 µB, m Fe(16k1)=1,89 µB, m Fe(16k2) = 2,03 µB, m Fe(8j1)= 1,87 µB, m Fe(8j2) = 2,34 µB, m Fe(4e)=1,87 dan m Fe(4c)=1,64 µB, Sedangkan besaran intrinsik energi maksimum (BH)max adalah 64,18 MGOe atau 510,87 kJ/m3."

"Composited tile was made using marble particles, phenol resin and hcxamethy leneleiramine (HEXA) as the catalyst. The matrix and hardener of these materials were mixed on volume variation from 62.50 ml to 12?,()<) ml. and on variation of 25. 40 and 60 mesh. Samples were dried in a room temperature for 3 hours. The compressive strength and crystal structure were analysed. The results showed that compressive strength values were in range of 6.15 x I07 N/m" - 9.61 x Id7 N/n. and there were two crystal structures consisted of marble crystal and phenol crystal. The analysis was carried out by using the Rietveld semi quantitative analysis. The final crystal structure of marble is rhombothedral, where the lanice constants arc a h =- 4.969 A: c = 17.026 A. This results indicate that the composites and marble can he used to make tile, because they were lighter, stronger and the amount of crystals increases compared with the pure marble."