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Triclinic crystal system
516 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Keldyshite | (Na,H)₂ZrSi₂O₇ | — | — |
| Kermesite | Sb₂OS₂ | — | 4.68 g/cm³ |
| Khesinite | Ca₄(Mg₃Fe³⁺₉)O₄(Fe³⁺₉Si₃)O₃₆ | — | — |
| Khvorovite | (Pb,Ba,K)₄Ca₂[Si₈B₂(Si,B)₂O₂₈]F | — | — |
| Kihlmanite-(Ce) | Ce₂TiO₂(SiO₄)(HCO₃)₂(H₂O) | — | — |
| Kingite | Al₃(PO₄)₂F₂(OH) · 7H₂O | — | — |
| Kingsmountite | Ca₄(Fe²⁺,Mn²⁺)Al₄(PO₄)₆(OH)₄ * 12H₂O | — | — |
| Klajite | MnCu₄(AsO₄)₂(AsO₃OH)₂·9H₂O | — | — |
| Kobokoboite | Al₆(PO₄)₄(OH)₆·11H₂O | — | — |
| Kobyashevite | Cu₅(SO₄)₂(OH)₆·4H₂O | — | — |
| Kochite | Ca₂MnZrNa₃Ti(Si₂O₇)₂(OF)F₂ | — | — |
| Kodamaite | Na₃(Ca₅Na)Si₁₆O₃₆(OH)₄F₂·(14-x)H₂O | — | — |
| Kokinosite | Na₂Ca₂(V₁₀O₂₈)·24H₂O | — | — |
| Koksharovite | CaMg₂Fe³⁺₄(VO₄)₆ | 4.5 | — |
| Kolskyite | (Ca,☐)Ti₂Na₂Ti₂(Si₂O₇)₂O₄(H₂O)₇ | — | — |
| Kolwezite | CuCo(CO₃)(OH)₂ | — | — |
| Korshunovskite | Mg₂Cl(OH)₃·4H₂O | — | — |
| Kribergite | Al₅(PO₄)₃(SO₄)(OH)₄ * 4H₂O | — | — |
| Kristiansenite | Ca₂ScSn(Si₂O₇)(Si₂O₆OH) | — | — |
| Kuliokite-(Y) | Y₄Al(SiO₄)₂(OH)₂F₅ | — | — |
| Kummerite | Mn²⁺Fe³⁺Al(PO₄)₂(OH)₂·8H₂O | — | — |
| Kuratite | Ca₂(Fe²⁺₅Ti)O₂[Si₄Al₂O₁₈] | — | — |
| Kurgantaite | CaSr[B₅O₉]Cl·H₂O | — | — |
| Kurnakovite | Mg[B₃O₃(OH)₅](H₂O)₄·H₂O | — | — |
| Kyanite | Al₂OSiO₄ | 7.5 | 3.68 g/cm³ |
| Lahnsteinite | Zn₄(SO₄)(OH)₆·3H₂O | — | — |
| Langhofite | — | — | — |
| Laueite | Mn²⁺Fe³⁺₂(PO₄)₂(OH)₂ * 8H₂O | 3.0 | — |
| Laverovite | K₂NaMn₇Zr₂(Si₄O₁₂)₂O₂(OH)₄F | — | — |
| Lechnerite | Ag₁₀Cu₄HgPb₃₃Sb₅₈S₁₂₈ | — | — |
| Lepageite | Mn²⁺₃(Fe³⁺₇Fe²⁺₄)O₃[Sb³⁺₅As³⁺₈O₃₄] | — | — |
| Letovicite | (NH₄)₃H(SO₄)₂ | — | — |
| Lisanite | — | — | — |
| Lishizhenite | ZnFe₂(SO₄)₄ * 14H₂O | — | — |
| Litidionite | KNaCuSi₄O₁₀ | — | — |
| Liversidgeite | Zn₆(PO₄)₄·7H₂O | — | — |
| Lomonosovite | Na₆Na₂Ti₂Na₂Ti₂(Si₂O₇)₂(PO₄)₂O₄ | — | — |
| Ludjibaite | — | — | 4.36 g/cm³ |
| Ludlockite | PbFe³⁺₄As³⁺₁₀O₂₂ | — | — |
| Lulzacite | Sr₂Fe²⁺(Fe²⁺,Mg)₂Al₄(PO₄)₄(OH)₁₀ | — | — |
| Lumsdenite | NaCa₃Mg₂(H₂O)₃₁(As³⁺V⁴⁺₂V⁵⁺₁₀As⁵⁺₆O₅₁)·14H₂O | — | — |
| Långbanshyttanite | Pb₂Mn₂Mg(AsO₄)₂(OH)₄·6H₂O | — | — |
| Lópezite | K₂Cr₂O₇ | 2.5 | 2.77 g/cm³ |
| Lüneburgite | Mg₃[B₂(OH)₆(PO₄)₂]·6H₂O | 2.0 | — |
| Magganasite | CuFe³⁺₃O(AsO₄)₃ | — | — |
| Magnesiofluckite | CaMg(AsO₃OH)₂(H₂O)₂ | — | — |
| Magnesiokoritnigite | Mg(AsO₃OH)·H₂O | — | — |
| Magnesiorowlandite-(Y) | Y₄(Mg,Fe)(Si₂O₇)₂F₂ | — | — |
| Magnéliite | Ti³⁺₂Ti⁴⁺₂O₇ | — | — |
| Makarochkinite | Ca₄[Fe²⁺₈Fe³⁺₂Ti₂]O₄[Si₈Be₂Al₂O₃₆] | — | — |
| Maletoyvayamite | Au₃Se₄Te₆ | — | — |
| Mambertiite | BiMo⁵⁺₂.₈O₈(OH) | — | — |
| Mampsisite | Ca₄Al₂(CO₃)(OH)₁₂·5H₂O | — | — |
| Mangazeite | Al₂SO₄(OH)₄·3H₂O | — | — |
| Marchettiite | C₅H₇N₅O₃ | — | — |
| Marcobaldiite | Pb₁₂(Sb₃As₂Bi)∑₆S₂₁ | — | — |
| Mariakrite | — | — | — |
| Markhininite | TlBi(SO₄)₂ | — | — |
| Martinite | (Na,☐,Ca)₁₂Ca₄(Si,S,B)₁₄B₂O₃₈(OH,Cl)₂F₂·4H₂O | 4.0 | — |
| Marécottite | — | — | — |
| Matthiasweilite | PbTe⁴⁺O₃ | — | — |
| Mcauslanite | Fe₃Al₂(PO₄)₃(PO₃OH)F * 18H₂O | — | — |
| Mcbirneyite | Cu₃(VO₄)₂ | — | — |
| Mckelveyite-(Y) | NaBa₃(Ca,U)Y(CO₃)₆·3H₂O | — | — |
| Mcnearite | NaCa₅(AsO₄)(HAsO₄)₄ * 4H₂O | — | — |
| Meisserite | Na₅(UO₂)(SO₄)₃(SO₃OH)(H₂O) | — | — |
| Meitnerite | (NH₄)(UO₂)(SO₄)(OH)*₂H₂O | — | — |
| Melanovanadite | Ca(V⁵⁺,V⁴⁺)₄O₁₀·5H₂O | 2.5 | — |
| Mellizinkalite | K₃Zn₂Cl₇ | — | — |
| Mendigite | Mn₂Mn₂MnCa(Si₃O₉)₂ | — | — |
| Mengeite | Ba(Mg,Mn²⁺)Mn³⁺₄(PO₄)₄(OH)₄*₄H₂O | — | — |
| Merelaniite | Pb₄Mo₄VSbS₁₅ | — | — |
| Meridianiite | MgSO₄·11H₂O | — | — |
| Messelite | Ca₂Fe²⁺(PO₄)₂·2H₂O | 3.5 | — |
| Metadelrioite | SrCa(VO₃)₂(OH)₂ | — | — |
| Metarauchite | Ni(UO₂)₂(AsO₄)₂·8H₂O | 2.0 | — |
| Metarossite | CaV⁵⁺₂O₆·2H₂O | — | — |
| Metavanuralite | Al(UO₂)₂(VO₄)₂(OH)·8H₂O | — | — |
| Meyerhofferite | CaB₃O₃(OH)₅·H₂O | — | — |
| Microcline | KAlSi₃O₈ | 6.0 | 2.46 g/cm³ |