Relax atom position only : NH2-Si + H-Si on  (Si3N4H2)6 surface (No dangling bond)
    1.0
            7.61003000 0.00000000 0.00000000 
            -3.80501500 6.59047930 0.00000000 
            0.00000000 0.00000000 21.72499000 
  N Si H
  25 18 12
Selective dynamics
Direct
        0.70218011 0.02023151 0.63028627  T T T      	#	1      	N1
        0.96576190 0.67661226 0.63250278  T T T      	#	2      	N2
        0.32725076 0.31052926 0.63038130  T T T      	#	3      	N3
        0.29722823 0.97720218 0.29636492  F F F      	#	4      	N4
        0.02247595 0.31977864 0.29637453  F F F      	#	5      	N5
        0.67979551 0.70226633 0.29640551  F F F      	#	6      	N6
        0.70386629 0.03559111 0.49762102  T T T      	#	7      	N7
        0.96096704 0.66824787 0.49822842  T T T      	#	8      	N8
        0.33282945 0.29766480 0.49758812  T T T      	#	9      	N9
        0.29559065 0.96434494 0.42883445  F F F      	#	10     	N10
        0.03558590 0.33117868 0.42883807  F F F      	#	11     	N11
        0.66874316 0.70432895 0.42887672  F F F      	#	12     	N12
        0.69844034 0.03356627 0.36301316  F F F      	#	13     	N13
        0.96622592 0.66467353 0.36300932  F F F      	#	14     	N14
        0.33515284 0.30137883 0.36297338  F F F      	#	15     	N15
        0.29067812 0.96437497 0.56501785  T T T      	#	16     	N16
        0.03408548 0.33427637 0.56333256  T T T      	#	17     	N17
        0.65991826 0.69552260 0.56207248  T T T      	#	18     	N18
        0.33325785 0.66652576 0.35467389  F F F      	#	19     	N19
        0.66370150 0.33067153 0.57204869  T T T      	#	20     	N20
        0.33222063 0.66862043 0.49814157  T T T      	#	21     	N21
        0.66666489 0.33329838 0.42986268  F F F      	#	22     	N22
        0.32101819 0.66555969 0.64592006  T T T      	#	23     	N23
        0.66656843 0.33308966 0.28630381  F F F      	#	24     	N24
        0.98249063 0.30305937 0.70761408  T T T      	#	25     	N
        0.55615994 0.76813016 0.61842804  T T T      	#	26     	Si1
        0.22719317 0.85220076 0.64118274  T T T      	#	27     	Si2
        0.14957281 0.39293022 0.63795820  T T T      	#	28     	Si3
        0.40721679 0.23761095 0.29417042  F F F      	#	29     	Si4
        0.76203919 0.16922510 0.29418522  F F F      	#	30     	Si5
        0.83038872 0.59241565 0.29421095  F F F      	#	31     	Si6
        0.59259247 0.77340163 0.49435243  T T T      	#	32     	Si7
        0.22383541 0.82402945 0.49771148  T T T      	#	33     	Si8
        0.17761064 0.40480778 0.49684852  T T T      	#	34     	Si9
        0.40497291 0.22726202 0.42984917  F F F      	#	35     	Si10
        0.77267457 0.17763396 0.42986518  F F F      	#	36     	Si11
        0.82230137 0.59497191 0.42988003  F F F      	#	37     	Si12
        0.59546490 0.77208061 0.36076182  F F F      	#	38     	Si13
        0.22769432 0.82317092 0.36074785  F F F      	#	39     	Si14
        0.17664155 0.40433268 0.36073086  F F F      	#	40     	Si15
        0.40028091 0.22554571 0.56629378  T T T      	#	41     	Si16
        0.77558868 0.18067330 0.56512497  T T T      	#	42     	Si17
        0.82125115 0.59300091 0.56663572  T T T      	#	43     	Si18
        0.65788613 0.07540461 0.66659200  T T T      	#	44     	H1
        0.90366394 0.58045854 0.66920252  T T T      	#	45     	H2
        0.38675168 0.29232771 0.67059954  T T T      	#	46     	H3
        0.30091584 0.90624150 0.25695247  F F F      	#	47     	H4
        0.09329128 0.39447484 0.25695244  F F F      	#	48     	H5
        0.60416100 0.69726454 0.25708470  F F F      	#	49     	H6
        0.33461506 0.30646578 0.24075938  F F F      	#	50     	H7
        0.69322591 0.02767308 0.24081106  F F F      	#	51     	H8
        0.97189573 0.66507681 0.24082179  F F F      	#	52     	H9
        0.88361711 0.36853413 0.70693248  T T T      	#	53     	H
        0.89093730 0.14271285 0.70745934  T T T      	#	54     	H10
        0.27910491 0.98991956 0.69169916  T T T      	#	55     	H12