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Monoclinic crystal system
1,774 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Pachnolite | NaCaAlF₆(H₂O) | 3.0 | — |
| Padĕraite | Cu₇[(Cu,Ag)₀.₃₃Pb₁.₃₃Bi₁₁.₃₃]S₂₂ | — | — |
| Palladoarsenide | Pd₂As | 5.0 | 10.14 g/cm³ |
| Palygorskite | (Mg,Al)₅(Si,Al)₈O₂₀(OH)₂·8H₂O | — | — |
| Pandoraite-Ba | BaV₄+₅V₅+₂O₁₆*₃H₂O | — | — |
| Pandoraite-Ca | CaV₄+₅V₅+₂O₁₆*₃H₂O | — | — |
| Panethite | (Na,Ca)₂(Mg,Fe²⁺)₂(PO₄)₂ | — | — |
| Papagoite | CaCuAlSi₂O₆(OH)₃ | — | 3.25 g/cm³ |
| Paraberzeliite | NaCa₂Mg₂(AsO₄)₃ | — | — |
| Paracelsian | BaAl₂Si₂O₈ | 6.0 | 3.34 g/cm³ |
| Paradocrasite | Sb₃As | — | — |
| Parageorgbokiite | Cu₅O₂(SeO₃)₂Cl₂ | — | — |
| Paralammerite | Cu₃(AsO₄)₂ | — | 5.25 g/cm³ |
| Paramarkeyite | — | — | — |
| Paramendozavilite | [KAl₄(H₂O)₃₀][Mo₁₂P₆Fe³⁺₆O₆₀(OH)₁₃] | — | — |
| Paramolybdomenite | PbSeO₃ | — | 6.95 g/cm³ |
| Paranatrolite | Na₂(Si₃Al₂)O₁₀·3H₂O | — | — |
| Paraotwayite | Ni(OH)₂-x(SO₄,CO₃)₀.₅x | — | — |
| Parapierrotite | TlSb₅S₈ | — | — |
| Pararaisaite | CuMg[Te₆+O₄(OH)₂]*₆H₂O | — | — |
| Pararealgar | As₄S₄ | — | — |
| Parasibirskite | Ca₂(B₂O₅)·H₂O | — | — |
| Parasterryite | Ag₄Pb₂₀(Sb,As)₂₄S₅₈ | — | — |
| Parauranophane | Ca(UO₂)₂(SiO₃OH)₂·5H₂O | — | — |
| Parawulffite | K₅Na₃Cu₈O₄(SO₄)₈ | — | — |
| Pargasite | NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂ | 5.5 | — |
| Parisite-(Ce) | CaCe₂(CO₃)₃F₂ | — | — |
| Parisite-(La) | CaLa₂(CO₃)₃F₂ | — | — |
| Parisite-(Nd) | CaNd₂(CO₃)₃F₂ | — | — |
| Parkerite | Ni₃(Bi,Pb)₂S₂ | — | — |
| Parthéite | Ca₂(Si₄Al₄)O₁₅(OH)₂·4H₂O | — | — |
| Parwanite | NaMg₄Al₈(PO₄)₈(CO₃)(OH)₇·30H₂O | — | — |
| Parádsasvárite | Zn₂(CO₃)(OH)₂ | — | — |
| Pascoite | Ca₃V⁵⁺₁₀O₂₈·17H₂O | 2.5 | — |
| Patrónite | VS₄ | 2.0 | 2.67 g/cm³ |
| Paulhlavaite | CaCuTe⁴⁺₄O₁₀ | — | — |
| Paulišite | Ca₂Zn(CO₃)₃·2H₂O | — | — |
| Paulmooreite | Pb₂[As₂O₅] | — | — |
| Paulscherrerite | UO₂(OH)₂ | — | — |
| Pavonite | AgBi₃S₅ | — | 6.62 g/cm³ |
| Penberthycroftite | [Al₆(AsO₄)₃(OH)₉(H₂O)₅]·8H₂O | — | — |
| Pennantite | Mn²⁺₅Al(AlSi₃O₁₀)(OH)₈ | — | — |
| Penobsquisite | Ca₂Fe²⁺[Cl|B₉O₁₃(OH)₆]Cl * 4H₂O | — | — |
| Penriceite | — | — | — |
| Perbøeite-(Ce) | — | — | — |
| Perbøeite-(La) | — | — | — |
| Perchiazziite | Co₂(CO₃)(OH)₂ | — | — |
| Perchukite-(Y) | PbYAsSi₂O₈ | — | — |
| Peretaite | Ca(SbO)₄(SO₄)₂(OH)₂ * 2H₂O | — | — |
| Perloffite | Ba(Mn²⁺,Fe²⁺)₂Fe³⁺₂(PO₄)₃(OH)₃ | — | — |
| Perraultite | BaNaMn₄Ti₂(Si₂O₇)₂O₂(OH)₂F | — | — |
| Perrierite-(Ce) | Ce₄MgFe³⁺₂Ti₂(Si₂O₇)₂O₈ | — | — |
| Perrierite-(La) | (La,Ce,Ca)₄(Fe²⁺,Mn)(Ti,Fe³⁺,Al)₄[(Si₂O₇)O₄]₂ | — | — |
| Petalite | LiAl(Si₄O₁₀) | — | — |
| Petarasite | Na₅Zr₂(Si₆O₁₈)(Cl,OH) * 2H₂O | — | — |
| Petedunnite | CaZnSi₂O₆ | — | — |
| Peterandresenite | Mn₄Nb₆O₁₉·14H₂O | — | — |
| Peterchinite | Zn₃Zn₂(OH)₆As[O₃(OH)₃] | — | — |
| Petersenite-(Ce) | Na₄(Ce,La,Nd)₂(CO₃)₅ | — | — |
| Petewilliamsite | (Ni,Co)₃₀(As₂O₇)₁₅ | — | — |
| Petrovite | — | — | — |
| Petrovskaite | AuAgS | — | — |
| Pharmacolite | Ca(AsO₃OH)·2H₂O | — | — |
| Phillipsite-Ca | Ca₃(Si₁₀Al₆)O₃₂·12H₂O | — | — |
| Phillipsite-K | K₆(Si₁₀Al₆)O₃₂·12H₂O | — | — |
| Phillipsite-Na | Na₆(Si₁₀Al₆)O₃₂·12H₂O | — | — |
| Philrothite | TlAs₃S₅ | — | — |
| Phlogopite | KMg₃(Si₃Al)O₁₀(OH)₂ | 2.5 | 2.81 g/cm³ |
| Phoenicochroite | Pb₂O(CrO₄) | — | 7.00 g/cm³ |
| Phosphammite | (NH₄)₂(HPO₄) | — | 1.54 g/cm³ |
| Phosphocyclite-(Fe) | — | — | — |
| Phosphocyclite-(Ni) | — | — | — |
| Phosphofibrite | (H₂O,K)₃.₅Fe³⁺₈(PO₄)₆(OH)₇(H₂O)₅ | 4.0 | — |
| Phosphophyllite | Zn₂Fe²⁺(PO₄)₂·4H₂O | 3.0 | 3.10 g/cm³ |
| Phosphosiderite | FePO₄ * 2H₂O | — | — |
| Phoxite | (NH₄)₂Mg₂(C₂O₄)(PO₃OH)₂(H₂O)₄ | — | — |
| Picaite | NaCa[AsO₃OH][AsO₂(OH)₂] | — | — |
| Pickeringite | MgAl₂(SO₄)₄·22H₂O | — | — |
| Picromerite | K₂Mg(SO₄)₂·6H₂O | 2.5 | — |
| Piemontite | {Ca₂}{Al₂Mn³⁺}(Si₂O₇)(SiO₄)O(OH) | — | — |