Citation: Bonazzi, P.; Garbarino, C.; Menchetti, S. (1992). Crystal chemistry of piemontites: REE-bearing piemontite from Monte Brugiana, Alpi Apuane, Italy Sample: BR2P. European Journal of Mineralogy, 4, pp. 23-33.
Formula: Al1.88 Ca1.73 Ce0.02 Fe0.51 H La0.02 Mg0.01 Mn0.81 Nd0.01 O13 Pr0.002 Si2.97 Sr0.04
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al6 Ca4 Ce2 Fe6 H2 La2 Mg6 Mn8 Nd2 O26 Pr2 Si6 Sr2 (Al3 Ca2 Ce Fe3 H La Mg3 Mn4 Nd O13 Pr Si3 Sr)
Multiplicity: 1