uvite vs ericssonite

uvite (mineral) | ericssonite (mineral)

Images

| uvite | ericssonite formula | (Ca, Na)(Mg, Fe^(2+))_3Al_5Mg(BO_3)_3Si_6O_18(OH, F)_4 | BaMn^(2+)_2Fe^(3+)O[Si_2O_7](OH) discovery year | 1929 | 1967

| uvite | ericssonite density | 3.15 g/cm^3 | 4.21 g/cm^3 transparency | translucent | opaque | translucent | opaque birefringence | 0.0235 | 0.085 luster | vitreous | resinous | submetallic Mohs hardness | 7.5 | 4.5 tenacity | brittle | streak | light brown | brown magnetism | nonmagnetic | weakly magnetic color | yellowish brown | brown | blackish brown | bluish black | reddish black fracture | subconchoidal | brittle molar mass | 970.2 g/mol | 504.2 g/mol

| uvite | ericssonite Strunz ID | VIII/E.19-90 | VIII/C.13-40 Dana ID | 61.3b.1.3 | 56.2.6c.3 IMA number | | IMA1966-013 ICSD number | ICSD74189 |

| uvite | ericssonite crystal system | trigonal | monoclinic crystal class | 3m | 2/m unit cell volume | 1598 Å^3 (cubic ångströms) | 764.5 Å^3 (cubic ångströms) d-spacing | 2.965 Å (ångströms) | 2.577 Å (ångströms) | 2.043 Å (ångströms) | 3.51 Å (ångströms) | 2.687 Å (ångströms) | 2.78 Å (ångströms) intensity | 100% | 90% | 80% | 100% | 70% | 60% molecules per unit cell | 3 molecules per cell | 4 molecules per cell 2V angle | | 11 π/36 radians≈55° (degrees) refractive indices | 0 | 0 | 0 | 0 | 1.65 | 0 | 1.805 | 1.837 | 1.89 | 0 | 0 | 0 dispersion | | strong unit cell lengths | 15.97 Å (ångströms) | 7.231 Å (ångströms) | 7.231 Å (ångströms) | 20.46 Å (ångströms) | 7.03 Å (ångströms) | 5.34 Å (ångströms) unit cell angles | 90° (degrees) | 90° (degrees) | 120° (degrees) | 90° (degrees) | 95.5° (degrees) | 90° (degrees)