# Iodate fluoride

The iodate fluorides are chemical compounds which contain both iodate and fluoride anions (IO$_3$$^−$ and F$^−$). In these compounds fluorine is not bound to iodine as it is in fluoroiodates.
Iodate fluorides are under investigation for the non-linear optical properties. The lack of symmetry is enhanced by the lone pair of electrons on the iodate group.

## List

| name | formula | weight | system | space group | unit cell | volume | density | properties |
| | K$_3$V$_2$O$_3$F$_4$(IO$_3$)$_3$ | 867.88 | orthorhombic | Cmc2$_1$ | a=11.6073 b=8.5216 c=15.098 Z=4 | 1493.4 | 3.86 | SHG 1.3 ×KDP; birefringence 0.158 @ 2050 nm |
| | CoIO$_3$F | | monoclinic | P2$_1$/n | a=4.9954 b=5.2110 c =12.5179 β=95.347° | | | |
| | NiIO$_3$F | | monoclinic | P2$_1$/n | | | | |
| zinc iodate fluoride | ZnIO$_3$F | 259.27 | monoclinic | P2$_1$/n | a=5.030 b=5.227 c=12.471 β=96.00 Z=4 | 326.13 | 5.281 | band gap 4.2 eV |
| | LiGaF$_2$(IO$_3$)$_2$ | 464.46 | monoclinic | P2$_1$/n | a=9.9994 b=5.1160 c=12.6619 β=106.444 Z=4 | 621.25 | 4.966 | stable to 400 °C band gap 4.33 eV |
| | NaGa(IO$_3$)$_3$F | 636.41 | monoclinic | P2$_1$/c | a=14.120 b=4.9149 c=13.631 β=112.968° Z=4 | | | band gap 4.27 eV; birefringence Δn$_{exp}$ = 0.203 at 1064 nm |
| | NaGa(IO$_3$)$_2$F$_2$ | 480.51 | monoclinic | P2$_1$/c | a=10.8243 b=4.8603 c=13.593 β=104.750° Z=4 | 691.6 | 6.615 | |
| | RbGaF$_3$(IO$_3$) | | orthorhombic | Pnma | a=7.8109 b=7.2758 c=10.1367 | | | |
| yttrium diiodate fluoride | Y(IO$_3$)$_2$F | 457.71 | hexagonal | P6$_3$ | a=6.8455 c=21.807 Z=6 | 885.0 | 5.153 | white |
| | ZrF$_2$(IO$_3$)$_2$ | | monoclinic | C2/c | a=16.352 b=5.2819 c=7.459 β=104.31° | | | |
| | Cd$_3$(IO$_3$)(IO$_4$)F$_2$·0.1CdO | | | R3m | a =15.286 c=9.574 | | | SHG 3.0xKDP band gap 4.0 eV |
| tin difluoride diiodate | Sn(IO$_3$)$_2$F$_2$ | 506.49 | monoclinic | P2$_1$ | a=5.436 b=9.91 c=6.28 β=105.44 Z=2 | 326.3 | 5.155 | band gap 4.08 SHG 3x; white |
| | CsVO$_2$F(IO$_3$) | 409.75 | orthorhombic | Pna2$_1$ | a=7.8974 b=10.2644 c=7.3854 Z=4 | 598.68 | 4.546 | alkaline metals |
| Barium iodate fluoride | Ba(IO$_3$)F | 331.24 | monoclinic | P2$_1$/c | a=10.5729 b=6.3354 c=6.0450 β=90.497° | 404.90 | 5.434 | band gap 4.32 eV; high birefringence |
| | α-Ba[VFO$_2$(IO$_3$)$_2$] | 589.08 | Orthorhombic | Pbcn | a=5.1494 b=12.644 c=12.400 Z=4 | 807.4 | 4.846 | colourless |
| | β-Ba[VFO$_2$(IO$_3$)$_2$] | 589.08 | Orthorhombic | P2$_1$2$_1$2$_1$ | a=7.1902 b=8.1964 c=13.0420 Z=4 | 768.6 | 5.091 | colourless |
| | α-Ba$_2$[VO$_2$F$_2$(IO$_3$)$_2$]IO$_3$ | 920.32 | Orthorhombic | Pna2$_1$ | a =13.578 b=11.425 c=7.500 Z=4 | 1163.5 | 5.254 | colourless |
| | β-Ba$_2$[VO$_2$F$_2$(IO$_3$)$_2$]IO$_3$ | 920.32 | monoclinic | P2$_1$ | a=7.3895 b=7.4994 c=10.9095 β=105.461 Z=2 | 582.69 | 5.245 | colourless |
| | α-Ba$_2$[GaF$_4$(IO$_3$)$_2$](IO$_3$) | 945.10 | orthorhombic | Pna2$_1$ | a=13.6984 b=11.3696 c=7.4245 Z=4 | 1156.76 | 5.429 | colourless SHG 6×KDP band gap 4.61eV |
| | β-Ba$_2$[GaF$_4$(IO$_3$)$_2$](IO$_3$) | 945.10 | monoclinic | P2$_1$ | a=7.4631 b=7.4511 c=10.9597 β=106.138 Z=2 | 585.24 | 5.361 | colourless SHG 6×KDP band gap 4.35 |
| | LaZr(IO$_3$)$_5$F$_2$ | | monoclinic | P2$_1$/n | a=7.5227 b=18.5262 c=10.3238 β=93.155° | | | band gap 4.13 eV |
| | Ce(IO$_3$)$_3$F | | monoclinic | P2$_1$/c | a =6.9430 b =8.2205 c=29.9956 β 89.976° Z=8 | 1712.00 | 5.306 | |
| | Ce(IO$_3$)$_2$F$_2$·H$_2$O | 545.94 | orthorhombic | Ima2 | a=7.702 b=12.277 c=7.947 Z=4 | 751.4 | 4.826 | light yellow |
| | Li$_2$Ce(IO$_3$)$_4$F$_2$ | 891.60 | monoclinic | C2/c | a =12.5663 b =5.5853 c=17.1623 β=95.953° Z=4 | 1198.07 | 4.943 | yellow |
| | CaCe(IO$_3$)$_3$(IO$_3$F)F | | orthorhombic | Pna2$_1$ | a=11.068 b=18.151 c=6.0301 | | | |
| | HfF$_2$(IO$_3$)$_2$ | | | | | | | band gap 4.11 eV |
| | CsHfF$_4$(IO$_3$) | 562.30 | orthorhombic | Ima2 | a=7.4321 b=11.156 c=8.030 Z=4 | 665.8 | 5.610 | SHG 3.5 × KH$_2$PO$_4$ band gap 4.47 eV transparent from 270 to 9900 nm birefringence 0.161 |
| | K$_5$(W$_3$O$_9$F$_4$)(IO$_3$) | 1141.95 | monoclinic | Pm | a=9.7129 b=3.7122 c=10.9575 β=102.007 Z=1 | 386.44 | 4.907 | SHG 11×KDP |
| | PbF(IO$_3$) | | orthorhombic | C2ma | a = 6.0438 b = 5.7840 c = 11.0731 Z=2 | | | |
| | PbF(IO$_3$) | | monoclinic | P11n | a=4.1581 b=4.1548 c=11.0416 β=92.47° | | | |
| | Bi(IO$_3$)F$_2$ | 421.88 | monoclinic | C2 | a=12.827 b=5.3089 c=6.0790 β=101.384 Z=4 | 405.89 | 6.904 | SHG 11.5×KDP |
| | Bi$_3$OF$_3$(IO$_3$)$_4$ | 1399.54 | hexagonal | P6$_3$mc | a=10.880 c=6.993 | 716.8 | 6.484 | colourless SHG |
| | NH$_4$Bi$_2$(IO$_3$)$_2$F$_5$ | 880.80 | monoclinic | P2$_1$ | a=5.718 b=5.892 c=15.18 β=100.38 Z=2 | 502.9 | 5.817 | SHG 9.2×KDP |
| | KBi$_2$(IO$_3$)$_2$F$_5$ | 901.86 | monoclinic | P2$_1$ | a=5.687 b=5.864 c=14.82 β=100.095 Z=2 | 486.5 | 6.157 | colourless SHG |
| | RbBi$_2$(IO$_3$)$_2$F$_5$ | 948.23 | monoclinic | P2$_1$ | a=5.7357 b=5.9095 c=15.177 β=100.263 Z=2 | 506.2 | 6.221 | colourless SHG |
| | CsBi$_2$(IO$_3$)$_2$F$_5$ | 995.67 | monoclinic | P2$_1$ | a=5.750 b=5.924 c=15.640 β=100.509 Z=2 | 523.8 | 6.313 | colourless SHG |