Accuracy

tantalum, cation   7269 Tantalum, cation

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    #  Species Formula
  7259 Hafnium(IV) hexabromideBr6Hf
  7260 Hafnium(IV) hexabromide (Geo)Br6Hf
  7261 Hafnium(I) iodideIHf
  7262 Hafnium(I) iodide (Geo)IHf
  7263 Trimethyl hafnium iodide (Geo)C3H9IHf
  7264 Trimethyl hafnium iodideC3H9IHf
  7265 Hafnium(IV) oxide diiodideOI2Hf
  7266 Hafnium(IV) hexaiodide, dianionI6Hf
  7267 Hafnium(IV) hexaiodide, dianion (Geo)I6Hf
  7268 Hafnium, dimerHf2
  7269 Tantalum, cation Ta
  7270 Tantalum, atomTa
  7271 Tantalum, anionTa
  7272 TaH3H3Ta
  7273 TaH3 (Geo)H3Ta
  7274 Pentamethyl tantalum(V)C5H15Ta
  7275 Pentamethyl tantalum(V) (Geo)C5H15Ta
  7276 Ta(V)(Me)5 (DOSCIX) (Geo)C5H15Ta
  7277 Ta(V)(Me)5 (DOSCIX)C5H15Ta
  7278 Tantalum, pentakis(dimethylamino)- (Geo)C10H30N5Ta
  7279 Ta(II)(NH3)6H18N6Ta


ΔHf: 350.8 kcal/mol,     REF: NIST Chemistry WebBook, NIST Standard Reference Database, No. 69; W. G. Mallard, P. J. Linstrom, Eds., National Institute of Standards and Technology, Gaithersberg, http://webbook.nist.gov/chemistry.
  
 OPEN(4,6) MECI CHARGE=1 PM7
Tantalum, cation
 H=350.8 HR=NIST
 Ta     0.00000000 +0   0.00000000 +0   0.00000000 +0