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Triclinic crystal system
516 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Brandãoite | BeAl₂(PO₄)₂(OH)₂(H₂O)₅ | — | — |
| Breyite | Ca₃Si₃O₉ | — | — |
| Britvinite | Pb₁₄Mg₉(Si₁₀O₂₈)(BO₃)₄(CO₃)₂(OH)₁₂F₂ | — | — |
| Brunovskyite | NaZrSi₂O₆(OH) | — | — |
| Bukovskýite | — | — | — |
| Bulgakite | Li₂(Ca,Na)Fe²⁺₇Ti₂(Si₄O₁₂)₂O₂(OH)₄(F,O)(H₂O)₂ | — | — |
| Bultfonteinite | Ca₂[SiO₃(OH)]F·H₂O | 4.5 | — |
| Bunnoite | Mn²⁺₆AlSi₆O₁₈(OH)₃ | — | — |
| Burroite | Ca₂(NH₄)₂(V₁₀O₂₈)·15H₂O | — | — |
| Bussenite | Ba₄(Na,☐)₂(Fe²⁺,Na)₂Ti₂(Si₂O₇)₂(CO₃)₂O₂(OH)₂(H₂O)₂F₂ | — | — |
| Bustamite | CaMn²⁺(Si₂O₆) | — | — |
| Cairncrossite | Sr₂Ca₇(Si₄O₁₀)₄(OH)₂·15H₂O | — | — |
| Calcinaksite | KNaCa(Si₄O₁₀)·H₂O | — | — |
| Calcioaravaipaite | PbCa₂AlF₉ | — | 4.48 g/cm³ |
| Calciomurmanite | (Na,☐)₂Ca(Ti,Mg,Nb)₄[Si₂O₇]₂O₂(OH,O)₂(H₂O)₄ | — | — |
| Calciouranoite | (Ca,Ba,Pb,K,Na)U₂O₇·5H₂O | 4.0 | — |
| Caoxite | CaC₂O₄·3H₂O | — | — |
| Carboferriphoxite | [(NH₄)K(H₂CO₃)][Fe³⁺(HPO₄)(H₂PO₄)(C₂O₄)] | — | — |
| Carlhintzeite | Ca₂AlF₇·H₂O | — | — |
| Carlsonite | (NH₄)₅Fe³⁺₃O(SO₄)₆·7H₂O | — | — |
| Cassidyite | Ca₂Ni(PO₄)₂·2H₂O | — | — |
| Cattiite | Mg₃(PO₄)₂ * 2₂H₂O | — | — |
| Cesiodymite | CsKCu₅O(SO₄)₅ | — | — |
| Chabournéite | Tl₄Pb₂(Sb,As)₂₀S₃₄ | — | — |
| Chalcanthite | CuSO₄·5H₂O | 2.5 | — |
| Chalcosiderite | CuFe³⁺₆(PO₄)₄(OH)₈·4H₂O | — | — |
| Chenite | Pb₄Cu(SO₄)₂(OH)₆ | — | — |
| Chinchorroite | Na₂Mg₅(As₂O₇)₂(AsO₃OH)₂(H₂O)₁₀ | — | — |
| Chirvinskyite | (Na,Ca)₁₃(Fe,Mn,☐)₂(Ti,Zr)₅(Si₂O₇)₄(OH,O)₁₂*₂H₂O | — | — |
| Christelite | Zn₃Cu₂(SO₄)₂(OH)₆·4H₂O | — | — |
| Chudobaite | (Mg,Zn)₅(AsO₄)₂(HAsO₄)₂ * 10H₂O | — | — |
| Clairite | (NH₄)₂Fe³⁺₃(SO₄)₄(OH)₃·3H₂O | — | — |
| Cobaltkoritnigite | Co(AsO₃OH)·H₂O | — | — |
| Collinsite | Ca₂Mg(PO₄)₂·2H₂O | — | — |
| Copiapite | Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂·20H₂O | — | — |
| Coquandite | Sb³⁺₆₊ₓO₈₊ₓ(SO₄)(OH)ₓ·H₂O₁₋ₓ (x = 0.3) | — | — |
| Coralloite | Mn²⁺Mn³⁺₂(AsO₄)₂(OH)₂·4H₂O | — | — |
| Cornubite | Cu₅(AsO₄)₂(OH)₄ | 4.0 | — |
| Coskrenite-(Ce) | (Ce,Nd,La)₂(C₂O₄)(SO₄)₂ * 12H₂O | — | 2.88 g/cm³ |
| Coyoteite | NaFe₃S₅·2H₂O | — | — |
| Crerarite | Pt₂-x(Bi,Pb)₁₁(S,Se)₁₁ | — | — |
| Cryptochalcite | K₂Cu₅O(SO₄)₅ | — | — |
| Cuprodongchuanite | Pb₄CuZn₂(PO₄)₄(OH)₂ | — | — |
| Cuprosklodowskite | Cu(UO₂)₂(SiO₃OH)₂·6H₂O | 4.0 | — |
| Cuprozheshengite | Pb₄CuZn₂(AsO₄)₂(PO₄)₂(OH)₂ | — | — |
| Cylindrite | FePb₃Sn₄Sb₂S₁₄ | 2.5 | — |
| Cámaraite | Ba₃Na(Fe²⁺)₈Ti₄(Si₂O₇)₄O₄(OH)₄F₃ | — | — |
| Césarferreiraite | Fe²⁺Fe³⁺₂(AsO₄)₂(OH)₂·8H₂O | — | — |
| Dadsonite | Pb₂₃Sb₂₅S₆₀Cl | 2.5 | — |
| Dalnegorskite | Ca₅Mn(Si₃O₉)₂ | — | — |
| Dalnegroite | Tl₄Pb₂(As,Sb)₂₀S₃₄ | — | — |
| Davidlloydite | Zn₃(AsO₄)₂·4H₂O | — | 3.66 g/cm³ |
| Deanesmithite | — | — | — |
| Debattistiite | Ag₉Hg₀.₅As₆S₁₂Te₂ | — | — |
| Dellaite | Ca₆(Si₂O₇)(SiO₄)(OH)₂ | — | — |
| Demesmaekerite | Pb₂Cu₅(UO₂)₂(Se⁴⁺O₃)₆(OH)₆·2H₂O | — | — |
| Destinezite | Fe³⁺₂(PO₄)(SO₄)(OH)·6H₂O | — | — |
| Devilliersite | Ca₄Ca₂Fe³⁺₁₀O₄[(Fe³⁺₁₀Si₂)O₃₆] | — | — |
| Devitoite | [Ba₆(PO₄)₂(CO₃)][Fe²⁺₇(OH)₄Fe³⁺₂O₂(SiO₃)₈] | — | — |
| Dewitite | — | — | — |
| Disulfodadsonite | Pb₁₁Sb₁₃S₃₀(S₂)₀.₅ | — | — |
| Dokuchaevite | Cu₈O₂(VO₄)₃Cl₃ | — | — |
| Domerockite | Cu₄(AsO₄)(AsO₃OH)(OH)₃·H₂O | — | — |
| Dondoellite | Ca₂Fe(PO₄)₂·2H₂O | — | — |
| Dongchuanite | Pb₄ZnZn₂(PO₄)₄(OH)₂ | — | — |
| Donnayite-(Y) | NaSr₃CaY(CO₃)₆·3H₂O | — | — |
| Drechslerite | — | — | — |
| Dubińskaite | Ca₄Sc₂Al₄[Be₂Si₈O₃₀](OH)₂ | — | — |
| Désorite | Pb₂(Fe³⁺₆Zn)O₂(PO₄)₄(OH)₈ | — | — |
| Edtollite | K₂NaCu₅Fe³⁺O₂(AsO₄)₄ | — | — |
| Ehrleite | Ca₄Be₃Zn₂(PO₄)₆ * 9H₂O | — | — |
| Ellingsenite | Na₅Ca₆Si₁₈O₃₈(OH)₁₃·6H₂O | — | — |
| Enricofrancoite | KNaCaSi₄O₁₀ | — | — |
| Epistolite | (Na☐)Nb₂Na₃Ti(Si₂O₇)₂O₂(OH)₂(H₂O)₄ | — | — |
| Ericlaxmanite | Cu₄O(AsO₄)₂ | — | — |
| Ezcurrite | Na₂B₅O₇(OH)₃·2H₂O | — | — |
| Fairfieldite | Ca₂Mn²⁺(PO₄)₂·2H₂O | 3.5 | — |
| Faizievite | Li₆K₂Na(Ca₆Na)Ti₄(Si₆O₁₈)₂(Si₁₂O₃₀)F₂ | — | — |
| Fanguangite | (MoO₂)(PO₃OH)·4H₂O | — | — |
| Faustite | ZnAl₆(PO₄)₄(OH)₈·4H₂O | — | — |