Английская Википедия:Iodate nitrate

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Iodate nitrates are mixed anion compounds that contain both iodate and nitrate anions.

Giant birefringence

Iodate nitrates can have high birefringence. The scandium salt has a giant birefringence of 0.348 at 546 nm. When discovered in 2021 it was a record high birefringence for oxyanion compounds, but it was exceeded by CeF2(SO4) just a month later with a value of 0.361[1] and sodium hydrogen squarate hydrate, NaHC4O4·H2O with a value of 0.52 at 1064 nm.[2] All of these are beaten by hexagonal boron nitride (h-BN) with birefringence of 0.7 in visible light.[3]

List

formula name formula

weight

system space group cell Å volume density comments ref
Al(IO3)2NO3•6H2O aluminium diiodate nitrate hexahydrate hexagonal P321 a=6.764 c=8.09 Z=1 [4]
KIO3•KNO3•2HIO3 dipotassium dihydrogen triiodate nitrate orthorhombic P212121 a=7.109 b=10.638 c=15.5 [5]
Sc(IO3)2(NO3) scandium diiodate nitrate 1370.31 trigonal R32 a=5.3536 c=23.567 Z=1 584.96 3.890 colourless; giant birefringence 0.348 at 546 nm; SHG 4.0×KDP; UV edge 298 nm; stable to 360°C [6]
In(IO3)2(NO3) indium diiodate nitrate 526.63 trigonal R32 a=5.2165 c=24.195, γ=120° Z=3 570.2 4.601 colourless [7]
[In(IO3)(OH)(H2O)](NO3) 386.75 monoclinic P21/n a=5.5756 b=16.410 c=7.734, β=109.95 Z=4 665.2 3.862 colourless [7]
La(IO3)2(NO3) lanthanum diiodate nitrate trigonal P3121 a=7.1002 c=38.177 Z=9 SHG 0.6 × KDP; band gap 4.23 eV [8]
Ce(IO3)2(NO3) cerium diiodate nitrate 551.93 trigonal P3121 a=7.0537 c=37.972 Z=9 1639.8 5.030 SHG 1 × KDP [9]
α-Th(IO3)2(NO3)(OH) triclinic PШаблон:Overbar a=6.9581 b=7.2294 c=9.8989 α=68.896° β=88.759° γ=66.620° [10]
β-Th(IO3)2(NO3)(OH) orthorhombic Pbca a=7.1459 b=14.140 c=16.612 [10]

References

Шаблон:Reflist

Шаблон:Iodates Шаблон:Nitrates