Citation: Yang, H.-X.; Konzett, J.; Prewitt, C.T. (2001). Crystal structure of a new (21)-clinopyribole synthesized at high temperature and pressure. American Mineralogist, 86, pp. 1261-1266.
Formula: Al1.23 Ca1.52 H2 K1.1 Mg5.83 Na2.32 O36 Si12
Chemical name: ((Ca1.104 Na0.896) (Mg0.878 Al1.122) Si4 O12) (K (Ca0.416 Na1.424 K0.1 Mg0.06) Mg3 (Mg1.892 Al0.108) Si8 O22 (O H)2)
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al8 H4 Mg14 O72 Si24 (Al4 H2 Mg7 O36 Si12)
Multiplicity: 1