Shape Transformations of Strontium Sulfite Crystals in Metasilicate Gel

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  • 亜硫酸ストロンチウム結晶の形態変化過程の解明
  • アリュウサン ストロンチウム ケッショウ ノ ケイタイ ヘンカ カテイ ノ カ

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Abstract

Four crystalline forms of strontium sulfite were synthesized by a metasilicate gel-growth method. We found from inspection of the crystals growth that the strontium sulfite crystals with each form were produced through the two processes of shape transformations and discussed that the processes of shape transformations were changed by the ionic product ( [Sr2+] [SO32-] ) in the gel. To start with, spherulite of strontium sulfite was formed in the gel for all the conditions. The spherulite was not changed on the condition of [Sr2+] [SO32-] = 70.5 × 10-6-8.06 × 10-6 mol2 dm-6 in the gel. Then, the spherulite was transformed into the ellipsoidal form by way of the poly-spherulite on the condition of [Sr2+] [SO32-] =5.72 × 10-6-0.87 × 10-6 mol2 dm-6 in the gel. In addition, the spherulite was transfo rmed into the spindle form of single crystal by way of the growth of the center of poly-spherulite on the condition of [Sr2+] [SO32-] = 0.63 × 10-6-0.32 × 10-6 mol2 dm-6 in the gel.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1998 (9), 591-597, 1998-09-10

    The Chemical Society of Japan

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