Complete mineralogical data for PENROSEITE. Chemical Formula: (Ni,Co,Cu)Se2. Crystal System: Isometric. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for PENTAGONITE. Chemical Formula: CaV4+[Si4O10]O·4H2O. Crystal System: Orthorhombic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for PENTAHYDRITE. Chemical Formula: Mg(SO4)(H2O)4·H2O. Crystal System: Triclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for PENTAHYDROBORITE. Chemical Formula: Ca[B2O(OH)6]·2H2O. Crystal System: Triclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for PENTLANDITE. Chemical Formula: (Ni,Fe)9S8. Crystal System: Isometric. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for PENZHINITE. Chemical Formula: Au(Ag,Cu)4(S,Se)4. Crystal System: Hexagonal. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for PEPROSSIITE-(Ce). Chemical Formula: CeAl2(B3.67Si0.33)O10.67. Crystal System: Hexagonal. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for Peprossiite-(Y). Chemical Formula: YAl2(B3.67Si0.33)O10.67. Crystal System: Hexagonal-Trigonal. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for PERBØEITE-(Ce). Chemical Formula: (CaCe3)(Al3Fe2+)[Si2O7][SiO4]3O(OH)2. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for PERBØEITE-(La). Chemical Formula: (CaLa3)(Al3Fe2+)[Si2O7][SiO4]3O(OH)2. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.