REVIEW: MENENTUKAN PERBANDINGAN JARIJARI IONIK ATOM KECIL DENGAN ATOM BESAR (R/R) PADA STRUKTUR KRISTAL OKTAHEDRON DAN KUBUS

Authors

  • Irzaman Irzaman Staf Pengajar Departemen Fisika FMIPA Institut Pertanian Bogor, Kampus IPB Dramaga, Bogor, 16680.
  • Johan Iskandar Alumni S2 Biofisika Departemen Fisika FMIPA Institut Pertanian Bogor, Kampus IPB Dramaga, Bogor, 16680.
  • Ade Kurniawan Alumni S2 Biofisika Departemen Fisika FMIPA Institut Pertanian Bogor, Kampus IPB Dramaga, Bogor, 16680.

DOI:

https://doi.org/10.21009/SPEKTRA.021.04

Keywords:

crystal structure, cubic, ionic radius, octahedron, ratio of r/R

Abstract

Abstrak

Struktur kristal oktahedron dan kubus menarik untuk dikaiji ulang (review) agar dapat membekali pemahaman mahasiswa dalam menganalisis perbandingan jari-jari ionik atom kecil dengan jari-jari ionik atom besar (r/R) sebagai penyusun molekul dalam bahan keramik maupun kajian difraksi sinar-X dalam mata kuliah fisika modern. Kajian perbandingan (r/R) pada struktur kristal oktahedron (berbilangan koordinasi 6) diperoleh hasil perbandingan (r/R) dalam selang 0,414 – 0,732, sedangkan kubus (bilangan koordinasi 8) diperoleh hasil perbandingan (r/R) dalam selang 0,732 - 1. Contoh senyawa berstruktur oktahedron adalah NaCl, karena jari-jari ionik Na+ sebesar 0,102 nm dan jari-jari ionik Clsebesar 0,181 nm, sedangkan contoh senyawa berstruktur kubus adalah CsCl, karena jari-jari ionik Cs+ sebesar 0,170 nm.

Kata kunci: Jari-jari ionik, kubus, oktahedron, perbandingan r/R, struktur kristal.

Abstract

Octahedral and cubic crystal structure was interesting to be reviewed in order to provide an understanding to the students for analyzing the ionic radius ratio of small and large atoms (r/R) as molecul composer in ceramic materials and x-ray diffraction in modern physics chapter. Study of ratio on octahedron crystal structure (coordination number of 6) theorem resulted r/R ratio in range 0.414 0.732, while cubic structures (coordination number of 8) theorem resulted r/R ratio in range 0.732 - 1. For example octahedron structure is NaCl, because Na+ radii is 0.102 nm and Clradii is 0.181 nm, while for example cubic is CsCl, because Cs+ radii is 0.170 nm.

Key words: crystal structure, cubic, ionic radius, octahedron, ratio of r/R,.

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Published

2017-03-02

How to Cite

Irzaman, I., Iskandar, J., & Kurniawan, A. (2017). REVIEW: MENENTUKAN PERBANDINGAN JARIJARI IONIK ATOM KECIL DENGAN ATOM BESAR (R/R) PADA STRUKTUR KRISTAL OKTAHEDRON DAN KUBUS. Spektra: Jurnal Fisika Dan Aplikasinya, 2(1), 23–28. https://doi.org/10.21009/SPEKTRA.021.04

Issue

Vol. 2 No. 1 (2017): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 2 Nomor 1, April 2017

Section

Articles

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