- Home
- Crystal systems
- Trigonal
Trigonal crystal system
584 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Wusiheite | BaGe(Ge₃O₉) | — | — |
| Ximengite | Bi(PO₄) | — | 6.87 g/cm³ |
| Yarrowite | Cu₉S₈ | — | 4.89 g/cm³ |
| Yedlinite | Pb₆Cr(Cl,OH)₆(O,OH)₈ | — | — |
| Yoshiokaite | Ca₁₋ₓ(Al,Si)₂O₄ | — | — |
| Yurmarinite | Na₇(Fe³⁺,Mg,Cu)₄(AsO₄)₆ | — | — |
| Zadovite | BaCa₆[(SiO₄)(PO₄)](PO₄)₂F | — | — |
| Zakharovite | Na₄Mn₅Si₁₀O₂₄(OH)₆ * 6H₂O | — | — |
| Zaïrite | — | 4.5 | — |
| Zeophyllite | Ca₁₃Si₁₀O₂₈(OH)₂F₈ * 6H₂O | 3.0 | — |
| Zhemchuzhnikovite | NaMgAl(C₂O₄)₃·9H₂O | 2.0 | — |
| Zincalstibite | Zn₂Al(OH)₆[Sb₅+(OH)₆] | — | — |
| Zinconigerite-2N1S | (Zn,Al,Mg)₂(Al,Sn)₆O₁₁(OH) | — | — |
| Zinconigerite-6N6S | — | — | — |
| Zincovelesite-6N6S | Zn₃(Fe³⁺,Mn³⁺,Al,Ti)₈O₁₅(OH) | — | — |
| Zincowoodwardite | (Zn₁-ₓAlₓ)(SO₄)ₓ/₂(OH)₂ · nH₂O (x < 0.5, n < 3x/2) | 1.0 | — |
| Zirsilite-(Ce) | Na₁₁-₁₂(Ce,Na)₃Ca₆Mn₃Zr₃Nb(Si₁₉O₅₅)(Si₃O₉)₂(CO₃)(OH)₃ * H₂O | — | — |
| Zirsinalite | Na₆(Ca,Mn²⁺,Fe²⁺)Zr(Si₆O₁₈) | — | — |
| Zlatogorite | NiCuSb₂ | — | — |
| Zolotarevite | — | — | — |
| Zoltaiite | BaV₄+₂V³⁺₁₂(SiO₄)₂O₁₉ | — | — |
| Zussmanite | K(Fe,Mg,Mn)₁₃(Si,Al)₁₈O₄₂(OH)₁₄ | — | — |
| Åsgruvanite-(Ce) | Ce₁₆Ca₅Al(SiO₄)₆(AsO₃)₈(CO₃)₂Cl₄F₃(OH)₂ | — | — |
| Škáchaite | CaCo(CO₃)₂ | — | — |