( Titanite ( ( occurs ( as ( ( a ( common ( accessory mineral ) ) ) ( in ( ( ( ( ( intermediate and ) felsic ) ( igneous rocks ) ) and ) ( associated pegmatites ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Titanite)) (VP (VBZ occurs) (PP (IN as) (NP (NP (DT a) (JJ common) (JJ accessory) (NN mineral)) (PP (IN in) (NP (NP (ADJP (JJ intermediate) (CC and) (JJ felsic)) (NN igneous) (NNS rocks)) (CC and) (NP (VBN associated) (NNS pegmatites))))))) (. .)))
Titanite occurs as a common accessory mineral in intermediate and felsic igneous rocks and associated pegmatites.
(ROOT (S (NP (JJ Felsic) (NNS igneous) (NNS rocks)) (VP (VP (VBP contain) (NP (JJ felsic) (NNS minerals))) (, ,) (VP (ADVP (RB typically)) (VBP contain) (NP (NN aluminum) (CC and) (NN sodium))) (CC and) (VP (VBP are) (ADJP (JJ high) (PP (IN in) (NP (NN silica)))))) (. .)))
Felsic igneous rocks contain felsic minerals, typically contain aluminum and sodium and are high in silica.