As: n=0.9: Z=33: M=74.92159
O: n=1: Z=8: M=15.9994
La: n=1: Z=57: M=138.9055
Fe: n=1: Z=26: M=55.847
To be considered: Atom
  As1 -4.662 eV Elementary (As in /AeFe2As2/As-High)
  Fe1 -7.319 eV Elementary (Fe in /AeFe2As2/Fe-High)
  La1 -4.762 eV Elementary (La in /AeFe2As2/La-FCC-metal-High-U110)
  O1 -4.928 eV Elementary (O in /AeFe2As2/O2-SpinPolarized-High)
To be considered: Compound
  As1Fe1    -12.196 eV Compound (FeAs in /AeFe2As2/FeAs-High)
  As1Fe1La1O1    -28.489 eV Compound (LaFeAsO in /AeFe2As2/LaFeOAs-sqr2xsqr2x2AFM-InterplaneAFM-High-U110-NBANDS220)
  As1Fe2    -19.395 eV Compound (Fe2As in /AeFe2As2/./Fe2As-AFM2-High)
  As1La1    -11.535 eV Compound (LaAs in /AeFe2As2/LaAs-P4mmm-High-U110)
  As2Fe1    -17.143 eV Compound (FeAs2 in /AeFe2As2/FeAs2-High)
  As3La4    -41.626 eV Compound (La4As3 in /AeFe2As2/La4As3-I43d-High-U110)
  As7Fe8La8O8   -220.025 eV Compound (La8Fe8As7O8 in /AeFe2As2/LaFeOAs-sqr2xsqr2x2AFM-InterplaneAFM-VAs-High-U110-NBANDS220)
  As7Fe8La8O9   -228.604 eV Compound (La8Fe8As7O9 in /AeFe2As2/LaFeOAs-sqr2xsqr2x2AFM-InterplaneAFM-AstoO-High-U110-NBANDS220)
  As8Fe7La8O8   -219.818 eV Compound (La8Fe7As8O8 in /AeFe2As2/LaFeOAs-sqr2xsqr2x2AFM-InterplaneAFM-VFe-High-U110-NBANDS220)
  As8Fe8La7O8   -214.939 eV Compound (La7Fe8As8O8 in /AeFe2As2/LaFeOAs-sqr2xsqr2x2AFM-InterplaneAFM-VLa-High-U110-NBANDS220)
  As8Fe8La8O7   -217.839 eV Compound (La8Fe8As8O7 in /AeFe2As2/LaFeOAs-sqr2xsqr2x2AFM-InterplaneAFM-VO-High-U110-NBANDS220)
  As8Fe8La8O9   -233.436 eV Compound (La8Fe8As8O9 in /AeFe2As2/LaFeOAs-sqr2xsqr2x2AFM-InterplaneAFM-OI9-High-U110-NBANDS220)
  As9Fe8La8O7   -219.957 eV Compound (La8Fe8As9O7 in /AeFe2As2/LaFeOAs-sqr2xsqr2x2AFM-InterplaneAFM-OtoAs-High-U110-NBANDS220)
  Fe1O1    -14.376 eV Compound (FeO in /AeFe2As2/FeO-TypeII-High-U012)
  Fe2O3    -36.678 eV Compound (Fe2O3 in /AeFe2As2/Fe2O3-R3c-AFM2-High)
  Fe3O4    -51.724 eV Compound (Fe3O4 in /AeFe2As2/Fe3O4-High)
  La2O3    -40.286 eV Compound (La2O3 in /AeFe2As2/La2O3-High-U110)
Reaction: La+Fe+O+As-0.1As
  E(Reaction)=-21.20476525 eV

Max nElement for [La+Fe+O+As-0.1As]: 1

Minimum energy for [La+Fe+O+As-0.1As]
  Iter0:
    Stable composition:   -27.8681 eV: 0.019As8Fe7La8O8+0.05As8Fe8La8O7+0.05La2O3+0.119Fe1+0.35As1Fe1La1O1
                        Eform =    -6.6634 eV
  Last:
    Last composition  :   -21.2048 eV: La+Fe+O+As-0.1As
                        As0.90Fe1.00La1.00O1.00