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Abstract <p>A structural model of the sodium-depleted analogue of sacrofanite, a 28-layer cancrinite-group mineral with the empirical formula (Na<sub>3.18</sub>Ca<sub>2.81</sub>K<sub>1.93</sub>)(Si<sub>6.10</sub>Al<sub>5.83</sub>Fe<sub>0.07</sub>O<sub>24</sub>)(SO<sub>4</sub>)<sub>1.95</sub>F<sub>0.51</sub>Cl<sub>0.19</sub>(OH)<sub>0.23</sub>⋅ 0.155H<sub>2</sub>O from sanidine syenite of the Sacrofano paleovolcano, Latium (Italy) has been built. The investigated mineral is hexagonal, sp. gr. <i>P</i>-62<i>c</i>, with the lattice parameters [<i>a</i> = 12.90519(13), <i>c</i> = 74.2181(10) Å, <i>V</i>&#xa0;= 10704.6(3) Å<sup>3</sup>] close to those of holotype sacrofanite. The aluminosilicate framework of the investigated sodium-depleted sacrofanite contains columns of zeolitic cavities of four types: cancrinite, sodalite, Losod, and liottite. Their presence is confirmed by the IR spectroscopy data, unlike holotype sacrofanite, the published IR spectrum of which contains no characteristic band of the liottite cage at 547 ± 4 cm<sup>–1</sup>.</p>

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Model of the Crystal Structure of Sodium-Depleted Sacrofanite. Problem of the Sacrofanite Identification

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • N. V. Chukanov,
  • N. V. Zubkova,
  • I. V. Pekov,
  • D. A. Ksenofontov,
  • D. Yu. Pushcharovsky

摘要

Abstract

A structural model of the sodium-depleted analogue of sacrofanite, a 28-layer cancrinite-group mineral with the empirical formula (Na3.18Ca2.81K1.93)(Si6.10Al5.83Fe0.07O24)(SO4)1.95F0.51Cl0.19(OH)0.23⋅ 0.155H2O from sanidine syenite of the Sacrofano paleovolcano, Latium (Italy) has been built. The investigated mineral is hexagonal, sp. gr. P-62c, with the lattice parameters [a = 12.90519(13), c = 74.2181(10) Å, V = 10704.6(3) Å3] close to those of holotype sacrofanite. The aluminosilicate framework of the investigated sodium-depleted sacrofanite contains columns of zeolitic cavities of four types: cancrinite, sodalite, Losod, and liottite. Their presence is confirmed by the IR spectroscopy data, unlike holotype sacrofanite, the published IR spectrum of which contains no characteristic band of the liottite cage at 547 ± 4 cm–1.