Four mixed salts of amino acid L-histicline comprising hexalluorosilicate anion have been obtained in form of single crystals. These mixed salts are: orthorhombic 2L-His(2+)center dot 2ClO(4)(-)center dot SiF62-center dot 2H(2)O (space group P2(1)2(1)2, Z=2, alpha=10.1549(8) angstrom, b=14.847(1) angstrom, c=8.7536(7) angstrom, which is isostructural with recently published 2L-His(2+)center dot 2BF(4)(-)center dot SiF62-center dot 2H(2)O), monoclinic 2L-His(2+)center dot 2C1-center dot SiF62- (space group C2, Z=2, alpha=27.037(2) angstrom, b=6.9849(5) angstrom, c=5.3630(4) angstrom, beta=91.928(4)') and isostructural 2t-His2+.2Br-.5iF62(space group C2, Z=2, alpha=27.063(6) angstrom, 6=7.1013(17) angstrom, c=5.5076(11) A, fi=92.141(11)1, and triclinic 2t-His2 6042 "SiF62.3H20 (space group P1, Z=1, a=8.5005(17) A, b=8.7896(18) angstrom, c=9.7286(19) angstrom, alpha=71.49(3), (3=92.141(11), y=86.17(3)'). (C) 2013 Elsevier B.V. All rights reserved