Facts
- Symbol
- Ca
- Atomic number
- 20
- Atomic mass
- 40.1 u
- Minerals
- 1,411
- Period
- 4
- Group
- 2
- Block
- s
- Melting point
- 838.9 °C
- Boiling point
- 1,484 °C
- Discovered
- 1808
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q706
Minerals containing this element · 1,411
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Abuite | CaAl₂(PO₄)₂F₂ | Orthorhombic | — | — |
| Actinolite | Ca₂(Mg,Fe)₅[OH|Si₄O₁₁]₂ | Monoclinic | — | — |
| Adachiite | CaFe²⁺₃Al₆(Si₅AlO₁₈)(BO₃)₃(OH)₃(OH) | Trigonal | 7.0 | — |
| Addibischoffite | Ca₂Al₆Al₆O₂₀ | Triclinic | — | — |
| Adelite | CaMgAsO₄(OH) | Orthorhombic | 5.0 | — |
| Adrianite | Ca₁₂(Al₄Mg₃Si₇)O₃₂Cl₆ | Cubic | — | — |
| Aegirine-augite | (Ca,Na)(Fe³⁺,Mg,Fe²⁺)Si₂O₆ | Monoclinic | — | — |
| Aerinite | (Ca,Na)₆(Fe³⁺,Fe²⁺,Mg,Al)₄(Al,Mg)₆Si₁₂O₃₆(OH)₁₂(CO₃)·12H₂O | — | 3.0 | 2.48 g/cm³ |
| Afghanite | (Na,K)₂₂Ca₁₀(Si₂₄Al₂₄)O₉₆(SO₄)₆Cl₆ | Trigonal | — | — |
| Afwillite | Ca₃[SiO₃(OH)]₂·2H₂O | Monoclinic | — | — |
| Agakhanovite-(Y) | YCa☐₂KBe₃Si₁₂O₃₀ | Hexagonal | 6.0 | — |
| Agrellite | NaCa₂Si₄O₁₀F | Triclinic | 5.5 | — |
| Agrinierite | K₂Ca[(UO₂)₃O₃(OH)₂]₂·5H₂O | Orthorhombic | — | — |
| Akasakaite-(Ce) | (CaCe)(AlAlMn²⁺)O[Si₂O₇][SiO₄](OH) | Monoclinic | — | — |
| Akasakaite-(La) | (CaLa)(AlAlMn²⁺)O[Si₂O₇][SiO₄](OH) | Monoclinic | — | — |
| Aklimaite | Ca₄[Si₂O₅(OH)₂](OH)₄·5H₂O | Monoclinic | — | — |
| Albrechtschraufite | MgCa₄F₂[UO₂(CO₃)₃]₂·17-18H₂O | Triclinic | 2.8 | 2.60 g/cm³ |
| Aldridgeite | (Cd,Ca)(Cu,Zn)₄(SO₄)₂(OH)₆·3H₂O | Monoclinic | — | — |
| Aleksandrovite | KCa₇Sn₂Li₃Si₁₂O₃₆F₂ | Monoclinic | — | — |
| Alexkhomyakovite | K₆(Ca₂Na)(CO₃)₅Cl·6H₂O | Hexagonal | — | — |
| Alexshubnikovite | Ca₂Cu₉(AsO₄)₄(OH)₉Cl(H₂O)₈·2H₂O | Monoclinic | — | — |
| Alflarsenite | NaCa₂Be₃Si₄O₁₃(OH)·2H₂O | Monoclinic | — | — |
| Alfredstelznerite | Ca₄(H₂O)₄[B₄O₄(OH)₆]₄(H₂O)₁₅ | Orthorhombic | — | — |
| Aliettite | Ca₀.₂Mg₆(Si,Al)₈O₂₀(OH)₄·4H₂O | Monoclinic | — | — |
| Allanite-(Ce) | CaCe(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH) | Monoclinic | — | — |
| Allanite-(La) | CaLa(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH) | Monoclinic | — | — |
| Allanite-(Nd) | CaNd(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH) | Monoclinic | — | — |
| Allanite-(Sm) | (CaSm)(AlAlFe²⁺)O[Si₂O₇][SiO₄](OH) | Monoclinic | — | — |
| Allanite-(Y) | {CaY}{Al₂Fe²⁺}(Si₂O₇)(SiO₄)O(OH) | Monoclinic | — | — |
| Alloriite | (Na,K,Ca)₂₄(Na,Ca)₄Ca₄(Si,Al)₄₈O₉₆(SO₄)₄(SO₃,CO₃)₂(OH,Cl)₂(H₂O,OH)₄ | Trigonal | — | — |
| Alluaivite | Na₁₉(Ca,Mn²⁺)₆(Ti,Nb)₃Si₂₆O₇₄Cl·2H₂O | Trigonal | — | — |
| Alluaudite | (Na,Ca)(Mn,Mg,Fe²⁺)(Fe³⁺,Mn²⁺)₂(PO₄)₃ | Monoclinic | — | — |
| Alnaperbøeite-(Ce) | (CaCe₂.₅Na₀.₅)(Al₄)(Si₂O₇)(SiO₄)₃O(OH)₂ | Monoclinic | — | — |
| Alpeite | Ca₄Mn³⁺₂Al₂(Mn³⁺Mg)(SiO₄)₂(Si₃O₁₀)(V₅+O₄)(OH)₆ | Orthorhombic | — | — |
| Alstonite | BaCa(CO₃)₂ | Triclinic | — | — |
| Aluminocerite-(CeCa) | (Ce₆Ca₃)☐Al(SiO₄)₃(SiO₃OH)₄(OH)₃ | Trigonal | — | — |
| Aluminotaipingite-(CeCa) | (Ce₆Ca₃)◻Al(SiO₄)₃[SiO₃(OH)]₄F₃ | Trigonal | — | — |
| Alumohydrocalcite | CaAl₂(CO₃)₂(OH)₄·3H₂O | Triclinic | — | — |
| Alumovesuvianite | Ca₁₉Al(Al₁₀Mg₂)Si₁₈O₆₉(OH)₉ | Tetragonal | — | — |
| Alumoåkermanite | (Ca,Na)₂(Al,Mg,Fe²⁺)(Si₂O₇) | Tetragonal | — | — |
| Amamoorite | CaMn²⁺₂Mn³⁺(Si₂O₇)O(OH) | — | — | — |
| Aminoffite | Ca₃(BeOH)₂Si₃O₁₀ | Tetragonal | — | 2.83 g/cm³ |
| Amoraite | Ca₁₂Al₆(OH)₃₆(CO₃)₂(SO₃)·15H₂O | Triclinic | — | — |
| Amstallite | CaAl[(Al,Si)₄O₈(OH)₂](OH)₂·(H₂O,Cl) | Monoclinic | 4.0 | — |
| Anapaite | Ca₂Fe²⁺(PO₄)₂·4H₂O | Triclinic | 3.5 | 2.81 g/cm³ |
| Anatolygurbanovite | SrCa₂Si₃O₉ | Triclinic | — | — |
| Anatolyite | Na₆(Ca,Na)(Mg,Fe³⁺)₃Al(AsO₄)₆ | Trigonal | — | — |
| Andersonite | Na₂Ca(UO₂)(CO₃)₃·6H₂O | Trigonal | 2.5 | — |
| Andradite | Ca₃Fe³⁺₂(SiO₄)₃ | Cubic | — | — |
| Andrianovite | Na₁₂(K,Sr,Ce)₃Ca₆Mn₃Zr₃Nb(Si₂₅O₇₃)(O,H₂O,OH)₅ | Trigonal | — | — |
| Angastonite | CaMgAl₂(PO₄)₂(OH)₄·7H₂O | Amorphous | — | — |
| Anhydrite | CaSO₄ | Orthorhombic | 3.5 | 2.98 g/cm³ |
| Ankerite | Ca(Fe²⁺,Mg)(CO₃)₂ | Trigonal | — | 3.00 g/cm³ |
| Anorthite | CaAl₂Si₂O₈ | Triclinic | — | — |
| Anorthoroselite | Ca₂Co(AsO₄)₂·2H₂O | Triclinic | — | — |
| Antarcticite | CaCl₂·6H₂O | Trigonal | — | 1.72 g/cm³ |
| Antofagastaite | Na₂Ca(SO₄)₂·1.5H₂O | — | — | — |
| Aqualite | (H₃O)₈(Na,K,Sr)₅Ca₆Zr₃Si₂₆O₆₆(OH)₉Cl | Trigonal | — | — |
| Aradite | BaCa₆[(SiO₄)(VO₄)](VO₄)₂F | Trigonal | — | — |
| Aragonite | CaCO₃ | Orthorhombic | 3.8 | 2.93 g/cm³ |
Minerals named after it · 65
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Bacaferrite | BaCaFe₄O₈ | Trigonal | — | — |
| Barytocalcite | BaCa(CO₃)₂ | Monoclinic | — | — |
| Betpakdalite-CaMg | [Ca₂(H₂O)₁₇Mg(H₂O)₆][Mo⁶⁺₈As⁵⁺₂Fe³⁺₃O₃₆(OH)] | Monoclinic | — | — |
| Betpakdalite-NaCa | [Na₂(H₂O)₁₇Ca(H₂O)₆][Mo₆+₈As₅+₂Fe³⁺₃O₃₄(OH)₃] | — | — | — |
| Beusite-(Ca) | CaMn²⁺₂(PO₄)₂ | Monoclinic | — | — |
| Cafeosite | Ca₄Fe²⁺₃Fe³⁺₂◻O₆S₄ | Orthorhombic | — | — |
| Calciborite | CaB₂O₄ | Orthorhombic | — | 2.87 g/cm³ |
| Calcinaksite | KNaCa(Si₄O₁₀)·H₂O | Triclinic | — | — |
| Calcio-olivine | Ca₂(SiO₄) | Orthorhombic | — | 2.96 g/cm³ |
| Calcioancylite-(Ce) | (Ce,Ca,Sr)CO₃(OH,H₂O) | Orthorhombic | — | — |
| Calcioandyrobertsite | KCaCu₅(AsO₄)₄(H₂AsO₄) * 2H₂O | — | — | — |
| Calcioaravaipaite | PbCa₂AlF₉ | Triclinic | — | 4.48 g/cm³ |
| Calcioburbankite | Na₃(Ca,Ce,Sr,La)₃(CO₃)₅ | Hexagonal | — | — |
| Calciocatapleiite | CaZr(Si₃O₉) * 2H₂O | — | — | — |
| Calciocopiapite | CaFe³⁺₄(SO₄)₆(OH)₂·20H₂O | — | — | — |
| Calciodelrioite | Ca(VO₃)₂·4H₂O | Monoclinic | — | — |
| Calcioferrite | Ca₂Fe³⁺₂(PO₄)₃(OH) * 7H₂O | Monoclinic | — | — |
| Calciohilairite | CaZrSi₃O₉·3H₂O | — | — | — |
| Calciolangbeinite | K₂Ca₂(SO₄)₃ | Cubic | — | 2.73 g/cm³ |
| Calciomurmanite | (Na,☐)₂Ca(Ti,Mg,Nb)₄[Si₂O₇]₂O₂(OH,O)₂(H₂O)₄ | Triclinic | — | — |
| Calciopetersite | CaCu₆(PO₄)₂(PO₃OH)(OH)₆·3H₂O | Hexagonal | — | — |
| Calciopharmacoalumite | Ca₀,₅Al₄(AsO₄)₃(OH)₄·5H₂O | Cubic | — | — |
| Calciosamarskite | (Ca,Fe,Y)(Nb,Ta,Ti)O₄ | — | — | — |
| Calciotantite | CaTa₄O₁₁ | Hexagonal | — | 7.55 g/cm³ |
| Calciouranoite | (Ca,Ba,Pb,K,Na)U₂O₇·5H₂O | Triclinic | 4.0 | — |
| Calcioveatchite | SrCaB₁₁O₁₆(OH)₅·5H₂O | Monoclinic | — | — |
| Calcjarlite | NaCa₃Al₃F₁₆ | Monoclinic | — | — |
| Calclacite | Ca(CH₃COO)Cl·5H₂O | Monoclinic | 1.0 | — |
| Calcurmolite | (Ca,Na)₂(UO₂)₃Mo₂(O,OH)₁₁ * nH₂O | — | — | — |
| Calcybeborosilite-(Y) | (Y,REE,Ca)(B,Be)₂(SiO₄)₂(OH,O)₂ | — | — | — |
| Canaphite | — | Monoclinic | 2.0 | — |
| Canasite | K₃Na₃Ca₅Si₁₂O₃₀(OH)₄ | — | — | — |
| Chlorocalcite | KCaCl₃ | Orthorhombic | — | — |
| Chukhrovite-(Ca) | Ca₃Ca₁.₅Al₂(SO₄)F₁₃·12H₂O | Cubic | — | — |
| Clinoptilolite-Ca | Ca₃(Si₃₀Al₆)O₇₂*₂₀H₂O | Monoclinic | — | — |
| Dachiardite-Ca | Ca₂(Si₂₀Al₄)O₄₈·13H₂O | Monoclinic | — | — |
| Erionite-Ca | Ca₅[Si₂₆Al₁₀O₇₂]·30H₂O | Hexagonal | — | — |
| Fluorcalciobritholite | (Ca,REE)₅(SiO₄,PO₄)₃F | Hexagonal | — | — |
| Fluorcalciomicrolite | (Ca,Na,☐)₂Ta₂O₆F | Cubic | — | 6.16 g/cm³ |
| Fluorcalciopyrochlore | (Ca,Na)₂(Nb,Ti)₂O₆F | Cubic | — | 4.34 g/cm³ |
| Fluorcalcioroméite | (Ca,Na)₂Sb⁵⁺₂O₆F | Cubic | 5.5 | 5.11 g/cm³ |
| Fluorcaphite | SrCaCa₃(PO₄)₃F | — | 5.0 | — |
| Formicaite | Ca(CHOO)₂ | Tetragonal | 1.0 | — |
| Garronite-Ca | Ca₃(Al₆Si₁₀O₃₂)·14H₂O | Tetragonal | — | — |
| Gismondine-Ca | Ca₂(Si₄Al₄)O₁₆·8H₂O | Monoclinic | — | — |
| Gjerdingenite-Ca | K₂Ca(Nb,Ti)₄(Si₄O₁₂)₂(O,OH)₄·6H₂O | Monoclinic | — | — |
| Gmelinite-Ca | Ca₂(Si₈Al₄)O₂₄·11H₂O | Hexagonal | — | — |
| Heulandite-Ca | (Ca,Na)₅(Si₂₇Al₉)O₇₂ * 2₆H₂O | Monoclinic | — | — |
| Hydrocalumite | Ca₄Al₂(OH)₁₂(Cl,CO₃,OH)₂ * 4H₂O | — | — | — |
| Hydroxycalciomicrolite | Ca₁.₅Ta₂O₆(OH) | Cubic | — | 6.18 g/cm³ |
| Hydroxycalciopyrochlore | (Ca,Na,U,☐)₂(Nb,Ti)₂O₆(OH) | Cubic | — | — |
| Hydroxycalcioroméite | (Ca,Sb³⁺)₂(Sb⁵⁺,Ti)₂O₆(OH) | Cubic | 5.5 | — |
| Jahnsite-(CaFeMg) | CaFe²⁺Mg₂Fe³⁺₂(PO₄)₄(OH)₂·8H₂O | Monoclinic | — | — |
| Lévyne-Ca | Ca₃(Si₁₂Al₆)O₃₆·18H₂O | Trigonal | 4.0 | — |
| Mendozavilite-KCa | [K₂(H₂O)₁₅Ca(H₂O)₆][Mo₈P₂Fe³⁺₃O₃₄(OH)₃] | Monoclinic | — | — |
| Nacaphite | Na₂Ca(PO₄)F | Triclinic | — | 2.79 g/cm³ |
| Nacareniobsite-(Ce) | (Ca₃REE)Na₃Nb(Si₂O₇)₂(OF)F₂ | Monoclinic | — | — |
| Niocalite | Ca₇Nb(Si₂O₇)₂O₃F | Monoclinic | — | 3.17 g/cm³ |
| Nitrocalcite | Ca(NO₃)₂·4H₂O | Monoclinic | — | — |
| Oxycalciopyrochlore | Ca₂Nb₂O₆O | Orthorhombic | 5.0 | 4.41 g/cm³ |