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Monoclinic crystal system
1,774 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Nahcolite | NaHCO₃ | 2.5 | 2.30 g/cm³ |
| Nahpoite | Na₂HPO₄ | — | 2.49 g/cm³ |
| Namansilite | NaMn³⁺Si₂O₆ | — | — |
| Nannoniite | Al₂(OH)₅F | — | — |
| Nashite | Na₃Ca₂[(V⁴⁺V⁵⁺₉)O₂₈]·24H₂O | — | — |
| Natalyite | NaV³⁺Si₂O₆ | 7.0 | 3.55 g/cm³ |
| Natrite | Na₂CO₃ | — | 2.65 g/cm³ |
| Natrochalcite | NaCu₂(SO₄)₂(OH)·H₂O | 4.5 | — |
| Natrolemoynite | Na₄Zr₂Si₁₀O₂₆*₉H₂O | — | — |
| Natromelansonite | Na₃Zr[Si₇AlO₁₉]·4H₂O | — | — |
| Natron | Na₂CO₃·10H₂O | 1.5 | — |
| Natrosilite | Na₂Si₂O₅ | — | 2.61 g/cm³ |
| Natrotitanite | (Na₀.₅Y₀.₅)TiO(SiO₄) | — | — |
| Natroxalate | Na₂(C₂O₄) | 3.0 | 2.32 g/cm³ |
| Natrozippeite | Na₅(UO₂)₈(SO₄)₄O₅(OH)₃ * 12H₂O | 2.0 | — |
| Navajoite | Fe³⁺V₅+₉O₂₄ * 12H₂O | — | — |
| Nechelyustovite | (Na☐)☐₂Ba₄Ti₄Nb₄(Na₁₁☐)Ti₄(Si₂O₇)₈O₈(OH)₈(H₂O)₁₂ | — | — |
| Neptunite | Na₂KLiFe²⁺₂Ti₂Si₈O₂₄ | — | — |
| Nesquehonite | MgCO₃·3H₂O | — | — |
| Nestolaite | CaSeO₃·H₂O | — | — |
| Nickelbischofite | NiCl₂·6H₂O | — | — |
| Nickelhexahydrite | Ni(SO₄)(H₂O)₆ | 2.0 | 2.07 g/cm³ |
| Nickellotharmeyerite | CaNi₂(AsO₄)₂·2H₂O | — | 4.45 g/cm³ |
| Nickelpicromerite | K₂Ni(SO₄)₂·6H₂O | — | — |
| Nickeltsumcorite | Pb(Ni,Fe³⁺)₂(AsO₄)₂(H₂O,OH)₂ | 4.0 | 5.02 g/cm³ |
| Nickelzippeite | Ni₂(UO₂)₆(SO₄)₃(OH)₁₀ * 16H₂O | — | — |
| Nicksobolevite | Cu₇(SeO₃)₂O₂Cl₆ | — | — |
| Niedermayrite | Cu₄Cd(SO₄)₂(OH)₆·4H₂O | — | 3.36 g/cm³ |
| Nifontovite | Ca₃B₆O₆(OH)₁₂(H₂O)₂ | — | — |
| Nigelcookite | PbFe²⁺₂V³⁺₂(PO₄)₃(OH)₃ | — | — |
| Niigataite | CaSrAl₃[Si₂O₇][SiO₄]O(OH) | — | — |
| Niksergievite | Ba₂Al₃(Si,Al)₄O₁₀(CO₃)(OH)₆·nH₂O | — | — |
| Nimite | (Ni,Mg,Al)₆(Si,Al)₄O₁₀(OH)₈ | 3.0 | — |
| Nioboheftetjernite | — | — | — |
| Niocalite | Ca₇Nb(Si₂O₇)₂O₃F | — | 3.17 g/cm³ |
| Nissonite | Cu₂Mg₂(PO₄)₂(OH)₂·5H₂O | — | — |
| Nitrocalcite | Ca(NO₃)₂·4H₂O | — | — |
| Nitromagnesite | Mg(NO₃)₂·6H₂O | — | — |
| Nitroplumbite | [Pb₄(OH)₄](NO₃)₄ | — | — |
| Nitscheite | — | — | — |
| Nixonite | Na₂Ti₆O₁₃ | — | 3.50 g/cm³ |
| Nobleite | CaB₆O₉(OH)₂·3H₂O | — | — |
| Nollmotzite | Mg[U₅+(U₆+O₂)₂O₄F₃]*₄H₂O | — | — |
| Nontronite | Na₀.₃Fe₂((Si,Al)₄O₁₀)(OH)₂ * nH₂O | — | — |
| Nordstrandite | Al(OH)₃ | — | — |
| Normandite | NaCa(Mn,Fe)(Ti,Nb,Zr)(Si₂O₇)OF | — | — |
| Novgorodovaite | Ca₂(C₂O₄)Cl₂·2H₂O | 2.5 | — |
| Novograblenovite | (NH₄)MgCl₃·6H₂O | — | — |
| Novákite | (Cu,Ag)₂₁As₁₀ | — | — |
| Nullaginite | Ni₂CO₃(OH)₂ | — | — |
| Numanoite | Ca₄CuB₄O₆(OH)₆(CO₃)₂ | — | — |
| Nuragheite | Th(MoO₄)₂·H₂O | — | — |
| Nybøite | NaNa₂(Mg₃Al₂)(Si₇Al)O₂₂(OH)₂ | 6.0 | — |
| Nyholmite | Cd₃Zn₂(AsO₃OH)₂(AsO₄)₂·4H₂O | — | — |
| O'danielite | H₂NaZn₃(AsO₄)₃ | 3.0 | — |
| Odigitriaite | CsNa₅Ca₅[Si₁₄B₂O₃₈]F₂ | — | — |
| Odinite | (Fe,Mg,Al,Fe,Ti,Mn)₂.₄((Si,Al)₂O₅)(OH)₄ | — | — |
| Ohmilite | Sr₃(Ti,Fe³⁺)(Si₂O₆)₂(O,OH)·2H₂O | — | — |
| Ojuelaite | ZnFe³⁺₂(AsO₄)₂(OH)₂·4H₂O | 3.0 | — |
| Okhotskite | Ca₂Mn²⁺Mn³⁺₂(Si₂O₇)(SiO₄)(OH)₂·H₂O | — | — |
| Okruginite | Cu₂SnSe₃ | — | — |
| Okruschite | Ca₂Mn²⁺₅Be₄(AsO₄)₆(OH)₄·6H₂O | 3.5 | — |
| Olkhonskite | (Cr,V)₂Ti₃O₉ | — | — |
| Omongwaite | Na₂Ca₅(SO₄)₆·3H₂O | — | — |
| Omphacite | (Ca,Na)(Mg,Fe,Al)Si₂O₆ | — | — |
| Ootannite | Th⁴⁺₂W⁶⁺₄O₁₆·5H₂O | — | — |
| Orlovite | KLi₂TiSi₄O₁₁F | — | — |
| Orpiment | As₂S₃ | — | — |
| Orthoclase | K(AlSi₃O₈) | 6.0 | 2.46 g/cm³ |
| Osarsite | OsAsS | — | — |
| Oswaldpeetersite | (UO₂)₂(CO₃)(OH)₂·4H₂O | — | — |
| Ottoite | Pb₂TeO₅ | — | 8.74 g/cm³ |
| Owyheeite | Ag₃Pb₁₀Sb₁₁S₂₈ | — | — |
| Oxo-magnesio-hastingsite | NaCa₂(Mg₂Fe³⁺₃)(Si₆Al₂)O₂₂O₂ | 6.0 | — |
| Oxo-mangani-leakeite | NaNa₂(Mn³⁺₄Li)Si₈O₂₂O₂ | — | — |
| Oxykinoshitalite | BaMg₂Ti⁴⁺O₂(Si₂Al₂)O₁₀ | — | — |
| Oxyphlogopite | K(Mg,Ti,Fe)₃[(Si,Al)₄O₁₀](O,F)₂ | — | — |
| Oxyvanite | V³⁺₂V⁴⁺O₅ | — | — |
| Oyonite | Ag₃Mn₂Pb₄Sb₇As₄S₂₄ | — | — |
| Ozernovskite | — | — | — |