AM_Reinhardbraunsite Formula: Ca5 Si2 O9.394 F.606 H1.394 Name: Reinhardbraunsite Unit cell: 11.4542 5.0618 8.8917 90.0 108.7698 90.0 , V=488.11 Space group: P121/A1 (14)

Galuskina I O , Lazic B , Armbruster T , Galuskin E V , Gazeev V M , Zadov A E , Pertsev N N , Jezak L , Wrzalik R , Gurbanov A G , American Mineralogist , 94 (2009) p.1361-1370, Kumtyubeite Ca5(SiO4)2F2 - A new calcium mineral of the humite group from, Northern Caucasus, Kabardino-Balkaria, Russia, Locality: Northern Caucasus, Kabardino-Balkaria, Russia