| class="wikitable"
!formula
!name
!Ni Ox
!structure
!Remarks
!references |
| (NH4)2NiF4
|ammonium tetrafluoronickelate
|2
|
|Fuse NiCl2 with NH4F, light green color
|[{{cite journal|last1=Chaudhuri|first1=Mihir K.|last2=Ghosh|first2=Soumitra K.|last3=Hiese|first3=Zavei|title=Synthesis of tetrafluoronickelate(II) and tetrafluorozincate(II) complexes from aqueous media: a novel route to fluorometalates|journal=Journal of the Chemical Society, Dalton Transactions|date=1984|issue=8|pages=1763|doi=10.1039/DT9840001763|url=http://repository.ias.ac.in/23550/1/387.pdf}}][Handbook of inorganic substances 2017] |
| (NH4)2NiF4·2H2O
|ammonium tetrafluoronickelate dihydrate
|2
|
|Formed from Ni(OH)2 and NH4F in water
|[{{cite web|last1=Mellor|first1=J. W.|title=Nickel|work= A COMPREHENSIVE TREATISE ON INORGANIC AND THEORETICAL CHEMISTRY VOLUME XV Ni Ru, Rh Pd, Os, Ir|url=http://tera-3.ul.cs.cmu.edu/NASD/01cf394d-c0ee-4090-918f-a8413fe96bee/China/disk6/73/51-150/31005548/HTML/00000413.htm|access-date=31 May 2016|page=404|date=May 1936}}] |
| K2NiF4
|potassium tetrafluoronickelate
|2
|
|
| |
| Rb2NiF4
|rubidium tetrafluoronickelate
|2
|
|
| |
| Ba2NiF6
|barium nickel fluoride
|2
|
|yellow square plates cas=18115-49-6
|[{{cite book|last1=Macintyre|first1=Jane E.|title=Dictionary of Inorganic Compounds|publisher=CRC Press|isbn=9780412301209|page=3222|url=https://books.google.com/books?id=9eJvoNCSCRMC&pg=PA3222|access-date=25 April 2016|language=en|date=1992-07-23}}] |
| Pb2NiF6
|lead(II)nickel(II) fluoride
|2
|
|cas=27037-78-1
| |
| Li3NiF6
|
|3
|Pna2 C92v a=9.60 Å b=8.37 Å c=4.09 Å Z=4 density=3.27 / 3.24
|formed at 500° 70 bar F2
|[{{cite journal|last1=Whalen|first1=J.M.|last2=Lucier|first2=G.M.|last3=Chacón|first3=L.|last4=Bartlett|first4=N.|title=The room temperature conversion of nickel difluoride to hexafluoronickelate(IV) salts of alkali cations|journal=Journal of Fluorine Chemistry|date=March 1998|volume=88|issue=2|pages=107–110|doi=10.1016/S0022-1139(98)00105-5|bibcode=1998JFluC..88..107W |url=https://zenodo.org/record/1259621}}][{{cite journal|last1=Grannec|first1=J.|last2=Lozano|first2=L.|last3=Sobre|first3=P.|last4=Portier|first4=J.|last5=Hagenmuller|first5=P.|title=Sur un nouvel hexafluorure de nickel trivalent de formule Li3NiF6.|journal=Journal of Fluorine Chemistry|date=September 1975|language=fr|volume=6|issue=3|pages=267–274|doi=10.1016/S0022-1139(00)83005-5}}] |
| Na3NiF6
|sodium hexafluoronickelate
|3
|
|violet cas=22707-99-9
| |
| K3NiF6
|potassium hexafluoronickelate
|3
|
|violet cas=14881-07-3
| |
| KCs2NiF6
|dicesium potassium hexafluoronickelate
|3
|
|lilac colour cas=53479-35-9
| |
|
| Li2NiF6
|lithium hexafluoronickelate
|4
|hexagonal a=8.321 Å c=4.598 Å V=275.7 Å3 Z=3
|pink sol 0.5 g/100 g HF at 0°
|[{{cite web|last1=Chacon|first1=Lisa Carine|title=The Synthesis, Characterization and Reactivity of High Oxidation State Nickel Fluorides|url=https://publications.lbl.gov/islandora/object/ir%3A112067/datastream/PDF/download/citation.pdf|publisher=University of California|access-date=27 April 2016|location=Berkeley California|date=December 1997}}] |
| (O2)2NiF6
|dioxygenyl hexafluoronickelate
|
|
|possibly existing, decompose 10°
|[{{cite journal|last1=Bougon|first1=Roland A.|last2=Christe|first2=Karl O.|last3=Wilson|first3=William W.|title=Dioxygenyl salts containing doubly charged mononuclear counterions|journal=Journal of Fluorine Chemistry|date=November 1985|volume=30|issue=2|pages=237–239|doi=10.1016/S0022-1139(00)80892-1|bibcode=1985JFluC..30..237B }}][{{cite journal|last1=Marx|first1=Rupert|last2=Seppelt|first2=Konrad|title=Structure investigations on oxygen fluorides|journal=Dalton Trans.|date=2015|volume=44|issue=45|pages=19659–19662|doi=10.1039/C5DT02247A|pmid=26351980}}] |
| (NO2)2NiF6
|dinitronium hexafluoronickelate
|4
|
|ΔH=-471 kJ/mol, ΔH0f=-1120
| |
| Na2NiF6
|sodium hexafluoronickelate
|4
|cubic; or tetragonal
|purple red
|[{{cite book|last1=Macintyre|first1=Jane E.|title=Dictionary of Inorganic Compounds|publisher=CRC Press|isbn=9780412301209|page=3223|url=https://books.google.com/books?id=9eJvoNCSCRMC&pg=PA3223|access-date=25 April 2016|language=en|date=1992-07-23}}] |
| K2NiF6
|potassium hexafluoronickelate
|4
|K2PtCl6 structure
|red cas=17218-47-2
| |
| CaNiF6
|calcium hexafluoronickelate
|4
|
|ΔH=-363 kJ/mol, ΔH0f=-1951 kJ/mol sold as a fluorine source
|[{{cite journal|last1=Vorobyov|first1=A.F.|last2=Solovyov|first2=S.N.|last3=Minasian|first3=K.A.|last4=Dupal|first4=A.Ja.|last5=Sokolov|first5=V.B.|last6=Spirin|first6=S.N.|title=Thermochemistry of certain hexafluorometalates and tetrafluoroborates|journal=Journal of Fluorine Chemistry|date=September 1991|volume=54|issue=1–3|pages=333|doi=10.1016/S0022-1139(00)83842-7|bibcode=1991JFluC..54..333V }}] |
| Rb2NiF6
|rubidium hexafluoronickelate
|4
|K2PtCl6 structure
| red cas=17218-48-3
| |
| Cs2NiF6
|Cesium hexafluoronickelate
|4
|K2PtCl6 structure
|red cas=17218-49-4
| |
| SrNiF6
|strontium hexafluoronickelate
|4
|
| red cas=66456-12-0
| |
| BaNiF6
|barium hexafluoronickelate
|4
|K2PtCl6 structure
| red cas=66456-13-1
| |
| (NF4)2NiF6
|bis-tetrafluoroammonium hexafluoronickelate
|4
|tetragonal K2PtCl6 structure
| red cas=63105-40-8
| |
| (ClF2O)NiF6
|bis [difluorooxychlorine (V)] hexafluoronickelate (IV)
|4
|
|deep purple, stable to 60 °C
|[{{cite journal|last1=Foulds|first1=G.A.|title=1. Nickel|journal=Coordination Chemistry Reviews|date=February 1990|volume=98|page=2|doi=10.1016/0010-8545(90)80069-6}}][{{cite journal|last1=Wilson|first1=William W.|last2=Christe|first2=Karl O.|title=Synthesis and characterization of bis[difluorooxychlorine(V)] hexafluoronickelate(IV), (ClF2O)2NiF6|journal=Inorganic Chemistry|date=September 1984|volume=23|issue=20|pages=3261–3262|doi=10.1021/ic00188a048}}] |