Nitride fluoride

Nitride fluorides containing nitride and fluoride ions with the formula NF4-. They can be electronically equivalent to a pair of oxide ions O24-. Nitride fluorides were discovered in 1996 by Lavalle et al. They heated diammonium technetium hexafluoride to 300 °C to yield TcNF. Another preparation is to heat a fluoride compound with a nitride compound in a solid state reaction. The fluorimido ion is F-N2- and is found in a rhenium compound. nameformulaN:F ratiosystemspace groupunit cell (Å)volumedensitypropertiesreferencesdimagnesium fluoride nitrideL-Mg2NF1:1tetragonalI41/amda = 4.186, c = 10.042 decompose over 1000 °C to MgF2, Mg gas and N2 H-Mg2NF1:1 H for 1250-1350 °C and 20 kbar Mg3NF31:3cubicPmma = 4.216 light greendicalcium fluoride nitrideCa2NF1:1cubicFdma = 10.0215, Z = 161006.462.987light yellowdichromium fluoride nitrideCr2NF31:3 dark greendicobalt fluoride nitrideCo2NF1:1 dicopper fluoride nitrideCu2NF1:1 CaMgNF1:1 Fe4N3F31:1 αZn2NF1:1orthorhombicP212121a = 5.850, b = 5.892, c = 6.536 band gap 2.7 eVβtetragonalP41212a = 5.873, c = 6.532 band gap 2.8 eV Zn9N4F62:3 2 allotropes Zn7N4F4:1 distrontium fluoride nitrideSr2NF1:1 Fdma = 10.692, Z = 16 yellowish brownFd3ma = 10.765, Z = 16 dark red SrCaNF1:1cubicFdma = 10.340, Z = 161105.63.862yellow YNF31:3hexagonal a = 5.93, c = 4.79 Zr4ON3F53:5monoclinicP1121/ba = 5.1217, b = 21.513, c = 5.3669, γ = 90.128°, Z = 4 ZrNF1:1monoclinicP21/ca = 5.227, b = 5.026, c = 5.191, β = 98.98° NaZr3N3F43:4 P63/mmca = 3.654, c = 18.266 TcNF1:1hexagonal a = 5.98, c = 4.79 dibarium fluoride nitrideBa2NF1:1 Fmma = 5.679, Z = 2 dark violet LaNF3(1-x}x:3(1-x}cubic a = 5.847–5.871 Ce3NF61:6 a = 5.8027 F− conductor Pr3NF61:6 a = 5.7723 Gd3NF61:6cubic a = 5.617 Ce2MnN3F2−δ tetragonalP4/nmma = 3.8554, c = 13.088 Nitridomanganate LiSr2[TaN3]F3:1orthorhombicPbcaa = 10.768, b = 5.591, c = 15.891, Z 8956.7 Nitridotantalate, red, air sensitive ReNF1:1tetragonal a = 5.88, c = 13.00 Bi3NF61:6orthorhombicPbcma = 5.8174, b = 5.7018, c = 18.5113, Z = 4614.018.165grey, moisture sensitive ThNF1:1rhombohedral a = 7.13 ThNF4-3x tetragonal UNF (UNF)1:1orthorhombic a = 5.632–5.643, b = 5.602–5.610, c = 5.712–5.707 Complexes (AsPh)2[O2(TcNF2)2]2-1:2 yellow, O-bridged Rb4[O(TcNF4)2]1:4 orange yellow Cs4[O(TcNF4)2]1:4 orange yellow H[TcNF4]1:4 (NEt4)3(NH4)[Tc4N4O4F8] yellow greenmoleculesphosphonitrile fluoride (trimer)(NPF2)31:2rhombohedral triple point 27.8 °C; refractive index nα = 1.388, nβ = 1.419, nγ = 1.443phosphonitrile fluoride (tetramer)(NPF2)41:2monoclinic triple point 30.5 °Cpoly-phosphonitrile fluoride(NPF2)1:2 ReNF31:3 brownrhenium tetrafluoride nitrideReNF41:4orthorhombic a = 5.64, b = 14.76, c = 4.26354.6 yellow, molecular, mp 85 °Cfluoroimidorhenium pentafluorideReNF61:6monoclinic a = 5.298, b = 9.286, c = 9.979, β = 109.4, Z = 4463.24.507orange, molecular, N-F bonded, mp 80 °C

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