( ( ( The ( crystal structure ) ) ( of Sc2S3 ) ) ( ( is ( closely ( related ( to ( that ( of ( ( ( sodium chloride ) , ) ( ( in that ) ( it ( is ( based ( on ( ( a ( cubic ( ( close packed ) array ) ) ) ( of anions ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN crystal) (NN structure)) (PP (IN of) (NP (NNS Sc2S3)))) (VP (VBZ is) (ADJP (RB closely) (VBN related) (PP (TO to) (NP (NP (DT that)) (PP (IN of) (NP (NP (NN sodium) (NN chloride)) (, ,) (SBAR (WHPP (IN in) (WHNP (WDT that))) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN based) (PP (IN on) (NP (NP (DT a) (JJ cubic) (ADJP (RB close) (VBN packed)) (NN array)) (PP (IN of) (NP (NNS anions))))))))))))))) (. .)))
The crystal structure of Sc2S3 is closely related to that of sodium chloride, in that it is based on a cubic close packed array of anions.
(ROOT (S (NP (NP (NNS Compounds)) (PP (IN like) (NP (NN sodium) (NN chloride) (NN form) (NNS structures)))) (VP (VBD called) (NP (NNS crystals))) (. .)))