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Submitted
Dec 4, 2017
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Dec 4, 2017
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Abstract

Purifikasi dan karakterisasi silika berbasis pasir kuarsa dari Desa Pasir Putih Kecamatan Pamona Selatan Kabupaten Poso telah dilakukan pada penelitian ini. Penelitian ini dilakukan untuk meningkatkan kemurnian silika (SiO2) menggunakan metode purifikasi dengan mencampur sampel dalam larutan HCl 2 M kemudian dititrasi dengan aquades hingga PH 7 (netral). Sampel dikarakterisasi dengan menggunakan XRF dan XRD. Kandungan senyawa silika (SiO2) berdasarkan hasil analisis XRF sebelum pemurnian yaitu 99,51% dan setelah pemurnian diperoleh 99,89%. Hasil analisis XRD diperoleh bidang difraksi yaitu 3,26  dan sudut difraksi 27,31o. Pencocokan hasil analisis XRD dengan Software Search Match diperoleh konstanta kisi yaitu a = b = 4,8915 dan c = 5,3885 , bidang difraksi 3,33 , sudut difraksi 27,29o, orientasi bidang [011] dan grup ruang P 32 21 (154). Berdasarkan hasil tersebut disimpulkan bahwa sampel teridentifikasi berbentuk fasa kuarsa dengan struktur Kristal trigonal (heksagonal axes).

Keywords

Metode purifikasi SiO2 XRF XRD Software Search Match sistem kristal heksagonal konstanta kisi grup ruang bidang difraksi

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