function element_number(element_name) implicit none integer,parameter :: nelement_max = 103 character(len=2),intent(in) :: element_name integer :: element_number character(len=2),parameter :: element_list(nelement_max) = & (/' H', 'He', & ! 2 'Li','Be', ' B',' C',' N',' O',' F','Ne', & ! 10 'Na','Mg', 'Al','Si',' P',' S','Cl','Ar', & ! 18 ' K','Ca','Sc','Ti',' V','Cr','Mn','Fe','Co','Ni','Cu','Zn','Ga','Ge','As','Se','Br','Kr', & ! 36 'Rb','Sr',' Y','Zr','Nb','Mo','Tc','Ru','Rh','Pd','Ag','Cd','In','Sn','Sb','Te',' I','Xe', & ! 54 'Cs','Ba', & ! 56 'La','Ce','Pr','Nd','Pm','Sm','Eu','Gd','Tb','Dy','Ho','Er','Tm','Yb', & ! 70 'Lu','Hf','Ta',' W','Re','Os','Ir','Pt','Au','Hg','Tl','Pb','Bi','Po','At','Rn', & ! 86 'Fr','Ra', & ! 88 'Ac','Th','Pa',' U','Np','Pu','Am','Cm','Bk','Cf','Es','Fm','Md','No', & ! 102 'Lr' & ! 103 /) !===== integer :: ielement !===== ielement=1 do while( ADJUSTL(element_name) /= ADJUSTL(element_list(ielement)) ) if( ielement == nelement_max ) then write(*,'(a,a)') ' Input symbol ',element_name write(*,'(a,i3,a)') ' Element symbol is not one of first ',nelement_max,' elements' write(*,*) '!!! element symbol not understood !!!' stop endif ielement = ielement + 1 enddo element_number = ielement end function element_number function element_core(zval,zatom) implicit none double precision,intent(in) :: zval double precision,intent(in) :: zatom integer :: element_core !===== ! ! If zval /= zatom, this is certainly an effective core potential ! and no core states should be frozen. if( ABS(zval - zatom) > 1d0-3 ) then element_core = 0 else if( zval <= 4.00001d0 ) then ! up to Be element_core = 0 else if( zval <= 12.00001d0 ) then ! up to Mg element_core = 1 else if( zval <= 30.00001d0 ) then ! up to Ca element_core = 5 else if( zval <= 48.00001d0 ) then ! up to Sr element_core = 9 else write(*,*) '!!! not imlemented in element_core !!!' stop endif endif end function element_core function element_covalent_radius(zatom) ! Return covalent radius of an atom implicit none include 'parameters.h' integer,intent(in) :: zatom double precision :: element_covalent_radius ! ! Data from Cambridge Structural Database ! http://en.wikipedia.org/wiki/Covalent_radius ! ! Values are first given in picometer ! They will be converted in bohr later on select case(zatom) case( 1) element_covalent_radius = 31. case( 2) element_covalent_radius = 28. case( 3) element_covalent_radius = 128. case( 4) element_covalent_radius = 96. case( 5) element_covalent_radius = 84. case( 6) element_covalent_radius = 73. case( 7) element_covalent_radius = 71. case( 8) element_covalent_radius = 66. case( 9) element_covalent_radius = 57. case(10) ! Ne. element_covalent_radius = 58. case(11) element_covalent_radius = 166. case(12) element_covalent_radius = 141. case(13) element_covalent_radius = 121. case(14) element_covalent_radius = 111. case(15) element_covalent_radius = 107. case(16) element_covalent_radius = 105. case(17) element_covalent_radius = 102. case(18) ! Ar. element_covalent_radius = 106. case(19) element_covalent_radius = 203. case(20) element_covalent_radius = 176. case(21) element_covalent_radius = 170. case(22) element_covalent_radius = 160. case(23) element_covalent_radius = 153. case(24) element_covalent_radius = 139. case(25) element_covalent_radius = 145. case(26) element_covalent_radius = 145. case(27) element_covalent_radius = 140. case(28) element_covalent_radius = 124. case(29) element_covalent_radius = 132. case(30) element_covalent_radius = 122. case(31) element_covalent_radius = 120. case(32) element_covalent_radius = 119. case(34) element_covalent_radius = 120. case(35) element_covalent_radius = 120. case(36) ! Kr. element_covalent_radius = 116. case default write(*,*) '!!! covalent radius not available !!!' stop end select ! pm to bohr conversion element_covalent_radius = element_covalent_radius*pmtoau end function element_covalent_radius