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mineralogy elements Cr Chromium

Cr - Chromium - TRANSITION METAL

1857°
2482°
51.9961
-2
-1
1
2
3
4
5
6
24
Cr
[Ar] 3d5 4s1
2
8
13
1
1.66
6.7665
Synthetic
Radioactive
Liquid
Gaseous
Chromium Electronic configuration diagram
Electronic configuration diagram

Name Chromium
Number 24
Atomic 51.9961
Symbol Cr
Fusion 1857
Boiling 2482
Density 7.15
Period 4
Group 6
Discovery 1797 Vauquelin
Abundance 102
Radius 1.9
Electronegativity 1.66
Ionization 6.7665
Number of isotopes 9
Electronic configuration [Ar] 3d5 4s1
Oxidation states -2,-1,1,2,3,4,5,6
Electron by energy level 2,8,13,1

Mineral Hardness Density Formula
Andreyivanovite FeCrP
Ankangite 6.50 / 6.50 4.44 Ba(Ti,V3+,Cr)8O16
Ardennite-(V) 6.00 / 7.00 3.55 Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6
Barbertonite 1.50 / 2.00 2.10 Mg6Cr2(CO3)(OH)16·4H2O
Batisivite 7.00 / 7.00 4.62 BaTi6(V,Cr)8Si2O29
Bentorite 2.00 / 2.00 2.03 Ca6Cr2(SO4)3(OH)12·26H2O
Bouazzerite 2.81 Bi6(Mg,Co)11Fe14(AsO4)18O12(OH)4·86H2O
Bracewellite 5.50 / 6.50 4.45 CrO(OH)
Brezinaite 3.50 / 4.50 4.12 Cr3S4
Bushmakinite 3.00 / 3.50 6.22 Pb2Al(PO4)(VO4)(OH)
Carlosruizite 2.50 / 3.00 3.42 K3Na2Na3Mg5(IO3)6(SeO4)6·6H2O
Carlsbergite 7.00 / 7.00 5.90 CrN
Carmichaelite 6.00 / 6.00 4.13 (Ti,Cr,Fe)(O,OH)2
Cassedanneite 3.50 / 3.50 6.00 Pb5(VO4)2(CrO4)2·H2O
Caswellsilverite 1.00 / 2.00 3.21 NaCrS2
Chromatite 3.14 CaCr6+O4
Chrombismite 3.00 / 3.50 9.80 Bi16CrO27
Chromceladonite 1.00 / 2.00 2.90 KMgCrSi4O10(OH)2
Chromferide 4.00 / 4.00 6.69 Fe1.5Cr0.2
Chromio-pargasite 6.00 / 6.00 3.12 NaCa2(Mg4Cr)(Si6Al2)O22(OH)2
Chromite 5.50 / 5.50 4.50 Fe2+Cr2O4
Chromium 7.50 / 7.50 7.20 Cr
Chromium-dravite 7.00 / 7.50 NaMg3Cr6(Si6O18)(BO3)3(OH)3OH
Chromo-alumino-povondraite 7.50 / 7.50 3.23 NaCr3(Al4Mg2)(Si6O18)(BO3)3(OH)3O
Chromomphacite (Ca,Na)(Mg,Cr,Al)Si2O6
Chromphyllite 3.00 / 3.00 2.88 KCr2(Si3Al)O10(OH)2
Chromschieffelinite 2.00 / 2.00 5.89 Pb10Te6+6O20(OH)14(CrO4)·5H2O
Cochromite 7.00 / 7.00 5.22 CoCr2O4
Crichtonite 5.00 / 6.00 4.46 Sr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38
Crocoite 2.50 / 3.00 5.90 PbCrO4
Cronusite 1.50 / 1.50 2.51 Ca0.2CrS2·2H2O
Cuprokalininite 4.50 / 5.00 4.16 CuCr2S4
Daubréelite 4.50 / 5.00 3.81 FeCr2S4
Davidite-(Ce) 6.00 / 6.00 4.42 Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Davidite-(La) 6.00 / 6.00 4.42 La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Deanesmithite 4.50 / 5.00 8.00 Hg1+2Hg2+3S2OCrO4
Dessauite-(Y) 6.50 / 7.00 4.68 Sr(Y,U,Mn)Fe2(Ti,Fe,Cr,V)18(O,OH)38
Dietzeite 3.50 / 3.50 3.62 Ca2(IO3)2CrO4·H2O
Dissakisite-(La) 6.50 / 7.00 3.79 CaLaMgAl2(Si2O7)(SiO4)O(OH)
Dukeite 3.00 / 4.00 7.17 Bi3+24Cr6+8O57(OH)6·3H2O
Edoylerite 7.00 Hg2+3(Cr6+O4)S2
Embreyite 3.50 / 3.50 6.45 Pb5(CrO4)2(PO4)2·H2O
Eskolaite 8.00 / 8.50 5.18 Cr2O3
Ferchromide 6.50 / 6.50 6.00 Cr1.5Fe0.2
Ferrohögbomite-2N2S 6.00 / 7.00 (Fe,Mg,Zn,Al)3(Al,Ti,Fe)8O15(OH)
Florensovite 5.00 / 5.00 4.00 Cu1+(Cr3+1.5Sb5+0.5)S4
Fornacite 2.00 / 3.00 6.27 CuPb2(CrO4)(AsO4)(OH)
George-ericksenite 3.00 / 4.00 3.04 Na6CaMg(IO3)6(CrO4)2·12H2O
Georgerobinsonite Pb4(CrO4)2(OH)2FCl
Grimaldiite 3.50 / 4.50 4.11 CrO(OH)
Guyanaite 4.53 CrO(OH)
Hapkeite Fe2Si
Hashemite 3.50 / 3.50 4.59 BaCr6+O4
Hawthorneite 6.00 / 6.50 5.00 BaMgTi3Cr4Fe2+2Fe3+2O19
Heideite 3.50 / 4.50 4.10 (Fe,Cr)1.15(Ti,Fe)2S4
Hemihedrite 3.00 / 3.00 6.42 Pb10Zn(CrO4)6(SiO4)2F2
Iquiqueite 2.00 / 2.00 2.05 K3Na4Mg(CrO4)B24O39(OH)·12H2O
Iranite 3.00 / 3.00 5.80 Pb10Cu(CrO4)6(SiO4)2(OH)2
Isovite 8.00 / 8.00 7.40 (Cr,Fe)23C6
Joegoldsteinite 3.71 MnCr2S4
Kalininite 5.00 / 5.00 ZnCr2S4
Kassite 5.00 / 5.00 3.42 CaTi2O4(OH)2
Keilite FeS
Khristovite-(Ce) 5.00 / 5.00 4.05 CaCeMgMn2+Al(Si2O7)(SiO4)(OH)F
Knorringite 6.00 / 7.00 3.76 Mg3Cr2(SiO4)3
Kosmochlor 6.00 / 7.00 3.60 NaCrSi2O6
Krinovite 6.00 / 7.00 3.38 Na4(Mg8Cr3+4)O4[Si12O36]
Lakargiite 8.00 / 8.50 4.59 CaZrO3
Lindsleyite 7.50 / 7.50 4.63 (Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Lópezite 2.50 / 2.50 2.69 K2Cr2O7
Loveringite 7.50 / 7.50 4.41 (Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Macquartite 3.50 / 3.50 5.49 Cu2Pb7(CrO4)4(SiO4)2(OH)2
Magnesiochromite 5.50 / 5.50 4.20 MgCr3+2O4
Magnesiosadanagaite 5.50 / 6.00 3.00 NaCa2[Mg3(Fe3+,Al)2](Si5Al3)O22(OH)2
Manganochromite 5.50 / 5.50 4.86 Mn2+Cr2O4
Mapiquiroite 6.00 / 6.00 (Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38
Mariinskite 8.50 / 8.50 4.25 BeCr2O4
Mathiasite 7.50 / 7.50 4.60 (K,Ba,Sr)(Zr,Fe)(Mg,Fe)2(Ti,Cr,Fe)18O38
Mcconnellite 5.50 / 5.50 5.49 Cu1+CrO2
Molybdofornacite 2.00 / 3.00 6.60 CuPb2MoO4AsO4(OH)
Mongshanite 5.00 / 6.00 (Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
Mountkeithite 2.00 / 2.00 2.12 Mg11Fe3+3(SO4)3.5(OH)24·11H2O
Murchisite 4.22 Cr5S6
Natalyite 7.00 / 7.00 3.55 NaV3+Si2O6
Nichromite 6.00 / 6.50 5.24 NiCr2O4
Olkhonskite 8.00 / 8.00 4.48 Cr2Ti3O9
Oxy-chromium-dravite 7.50 / 7.50 3.30 NaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O
Painite 8.00 / 8.00 4.00 CaZrAl9O15(BO3)
Petterdite 2.00 / 2.00 3.97 PbCr2(CO3)2(OH)4·H2O
Phoenicochroite 2.50 / 2.50 7.01 Pb2O(CrO4)
Polyakovite-(Ce) 5.50 / 6.00 4.75 (Ce,Ca)4MgCr2(Ti,Nb)2Si4O22
Putnisite 1.00 / 2.00 2.23 SrCa4Cr3+8(CO3)8SO4(OH)16·25H2O
Qusongite 9.50 / 9.50 15.84 WC
Redingtonite 2.00 / 2.00 1.76 Fe2+Cr2(SO4)4·22H2O
Redledgeite 6.00 / 7.00 3.72 Ba(Ti4+6Cr3+2)O16
Reynoldsite 4.50 / 4.50 6.57 Pb2Mn4+2O5(CrO4)
Rilandite 2.00 / 3.00 Cr3+6SiO11·5H2O(?)
Santanaite 4.00 / 4.00 9.16 Pb11CrO16
Schöllhornite 1.50 / 2.00 2.70 Na0.3CrS2·H2O