Borate chloride

The borate chlorides are chemical compounds that contain both borate ions and chloride ions. They are mixed anion compounds. Many of them are minerals. Those minerals that crystallise with water (hydrates) may be found in evaporite deposits formed when mineral water has dried out.

List Chemical formulaMolar mass (g/mol)Crystal systemSpace groupUnit cell (Å)Volume (Å3)Density (g/cm3)CommentReferencesTeepleitetetragonalP4/nmma = 7.25, c = 4.84254.42.076Colourless, white or light beige crystals, with a vitreous, greasy, or dull lustre. Uniaxial (-) nω = 1.519 nε = 1.503

Max birefringence δ = 0.016BoraciteorthorhombicPca21a = 8.577, b = 8.553, c = 12.09 Z=4992.52.95Green, dark green (ferroan), blue, colourless, grey or white crystals with an adamantine, vitreous lustre if transparent. Biaxial (+) nα = 1.658 - 1.662 nβ = 1.662 - 1.667 nγ = 1.668 - 1.673 2V 82°

Max birefringence δ = 0.010 - 0.011Karliteorthorhombica = 17.92, b = 17.6, c = 3.19782.80White to light green crystals with a silky lustre. Biaxial (-) nα = 1.589 nβ = 1.632 nγ = 1.634

2V 24°

Max birefringence δ = 0.045Shabynitemonoclinic2.32Colourless or white crystals with a silky lustre. Biaxial (-) nα = 1.543 nβ = 1.571 nγ = 1.577

2V 49°

Max birefringence δ = 0.034SatimolitetrigonalRma = 15.1431, c = 14.456 Z=32.1White to colorless crystals with a vitreous or dull lustre. Biaxial (-) nα = 1.535 nβ = 1.552 nγ = 1.553 2V 26°

Max birefringence δ = 0.018KalborsiteTetragonala = 9.85, c = 13.061,2672.5Colorless with a slight rose-brownish tint crystals with a vitreous or pearly lustre. Uniaxial (+) nω = 1.525 nε = 1.525 ? Max birefringence δ = 0.000HilgarditetriclinicP1a=6.463 b=6.564 c=6.302 α = 61°38', β = 118°46', γ = 105°47' Z=1205.82.67 to 2.71Colorless, light pink crystals with a vitreous lustre.Solongoitemonoclinica = 7.93, b = 7.26, c = 12.54 β = 94°7202.514Colourless crystals with a vitreous lustre. Biaxial (+) nα = 1.510 nβ = 1.510 nγ = 1.545

Max birefringence δ = 0.035Ekaterinitehexagonala = 11.86, c = 23.882,9092.440White or white with slight rose tint crystals with a pearly lustre. Uniaxial (-) nω = 1.577 nε = 1.574 Max birefringence δ = 0.003Chelkarite or near Cl:OH = 3:1orthorhombica = 13.69, b = 20.84, c = 8.262,3572.21Colorless crystals. Biaxial (+) nα = 1.520 nγ = 1.558 Max birefringence δ = 0.038SakhaiteisometricFdma = 14.685 Z=43166.82.78 - 2.83Colourless, gray to grayish white crystals with a greasy lustre.Hydrochlorboritemonoclinica = 22.78, b = 8.74, c = 17.06 β = 96.7°33731.83 - 1.85Colorless crystals with a vitreous, dull lustre. Biaxial (+) nα = 1.499 nβ = 1.502 nγ = 1.521 2V 45°

Max birefringence δ = 0.022HeidornitemonoclinicC2/ca = 10.19, b = 7.76, c = 18.81 β = 93.33° Z=41,4852.753Colorless crystals with a vitreous lustre. Biaxial (+) nα = 1.579 nβ = 1.588 nγ = 1.604 2V 63° to 77°

Max birefringence δ = 0.025VolkovskitetriclinicP1a = 6.57, b = 23.92, c = 6.52 α = 90.58°, β = 119.1°, γ = 95.56°889.22.27Colourless or pink; varying from pale to deep orange crystals with a vitreous lustre. Biaxial (+) nα = 1.523 - 1.539 nβ = 1.539 - 1.540 nγ = 1.596 - 1.605 2V 14.6°

Max birefringence δ = 0.073KurgantaitetriclinicP1a = 6.5732, b = 6.4445, c = 6.3693, α = 60.995°, β = 61.257°, γ = 77.191° Z=12.99Colourless to white crystals with a vitreous lustre.ChambersiteorthorhombicPca21a = 8.68, b = 8.68, c = 12.26 Z=49243.49Colorless to deep purple crystals with a vitreous lustre. Biaxial (+) nα = 1.732 nβ = 1.737 nγ = 1.744

2V 83°

Max birefringence δ = 0.012Ericaiteorthorhombica = 8.58, b = 8.65, c = 12.179033.17 - 3.27Red, green, purple, brown or black crystals. Biaxial (-) nα = 1.731 nβ = 1.755 nγ = 1.755 Max birefringence δ = 0.024CongolitetrigonalR3ca = 8.62, c = 21.0513553.58Pale red or pink crystals. Uniaxial (-) nω = 1.755 nε = 1.731

Max birefringence δ = 0.024Trembathitetrigonala = 8.57, c = 20.9913352.84 - 3.34Colourless to pale blue transparent crystals with a vitreous lustre. Uniaxial (-) nω = 1.684 nε = 1.668

Max birefringence δ = 0.016BandylitetetragonalP4/nmma = 6.19 Å, c = 5.61 Z=2214.92.81Deep blue crystals with greenish portions; cendre blue to Italian blue, becoming greener with atacamite inclusions, with a vitreous or pearly lustre. Uniaxial (-) nω = 1.691 - 1.692 nε = 1.640 - 1.641

Max birefringence δ = 0.051350.75OtrhorhombicPca21a=17.229 b=9.3827 c=6.6452 Z=41074.252.169birefringence 0.094 at 1064 nmNa4[B6O9(OH)3](H2O)ClOtrhorhombicPca21a=15.4867 b=8.6867 c=8.8551 Z=21191.32.260SHG 0.4 × KDP392.05orthorhombicPca21a=8.5319 b=8.5282 c=12.0730 Z=4878.452.964NLOKZn2BO3Cl2trigonalR32NLO SHG 1.3 × KDPAg4B7O12Cl734.6triclinicPa=8.7394 b=8.7881 c=9.1381 α=65.625° β=77.269° γ=61.173° Z=2562RbZn2BO3Cl2345.92trigonalR32a=4.965 c=27.21NLO SHG 1.17 × KDPSn3B3O7ClorthorhombicPna21a=9.5239 b=7.5804 c=12.3065 Z=418254.007SHG 0.5 × of KDPorthorhombicPbcna =19.1905 b=10.3893 c=8.5164UV cutoff 280 nm; birefringence 0.125 at 546 nm1201.90monoclinicP21/na=8.229 b=12.259 c=19.080 β=90.20 Z=41924.74.418colourlesstetragonalP42nma = 12.048, c = 6.817NLO1192.62tetragonalP42nma=12.1033 c=6.8329 Z=21001.03.957SHG 1.5xKDPRb4Ba2.5B20O34Cl1481.10triclinicPa=6.756 b=11.086 c=11.288 α=99.07° β=90.60° γ=100.38° Z=1820.62.9965colourlesstriclinicLaB4O6(OH)2ClmonoclinicCca=6.5144 b=11.2478 c=9.7879 β=105.227° Z=4692.013.337SHG 2.3 × KDP;m UV edge <180 nmCs2La2B10O17Cl41065.54monoclinicCma=8.6904 b=20.92 c=6.4231 β =104.003 Z=21126.153.142SHG 2.1xKDPtriclinicPa = 4.2174; b = 6.5763; c = 8.1221 α = 82, 152; β = 89, 206; γ = 72.048°; Z = 2hexagonalP63/ma = 9.2008, c = 5.8079; Z = 2CeB4O6(OH)2ClmonoclinicCca=6.4949 b=11.200 c=9.714 β=105.202° Z=4681.93.3982.1 × KDPtriclinic1566triclinicPa=8.001 b=8.054 c=13.116 α=89.52 β=89.66 γ=69.942793.96.551colourlessPu[B4O6(OH)2Cl] monoclinicCca=6.4898 b=11.174 c=9.6183 β=105.15°Pu2[B13O19(OH)5Cl2(H2O)3] monoclinicP21/na=8.0522 b=14.568 c=9.82 β=90.12°Am[B9O13(OH)4]·H2O monoclinicP21/na=7.703Å b=16.688Å c=9.872 β=90.073°Cm2[B14O20(OH)7(H2O)2Cl] monoclinicP21/na=7.9561 b=14.212 c=9.836 β=90.013°

References