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chem
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mw
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crystal system
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space group
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unit cell Å
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volume
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density
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comment
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references
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sulfoborite
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Mg3(OH)[B(OH)4]2(SO4)F
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orthorhombic
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Pnma
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a=10.132 b=12.537 c=7.775
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987.6
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Biaxial (-) nα = 1.527 nβ = 1.536 nγ = 1.551
2V 79°
Max birefringence δ = 0.024
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[1]
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Heidornite
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Na2Ca3B5O8(OH)2(SO4)2Cl
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monoclinic
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C2/c
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a = 10.19, b = 7.76, c = 18.81
β = 93.33° Z=4
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1,485
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2.753
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Biaxial (+) nα = 1.579 nβ = 1.588 nγ = 1.604
2V 63° to 77°
Max birefringence δ = 0.025
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[2]
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Charlesite
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Ca6Al(SO4)2B(OH)4(O,OH)12•26H2O
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trigonal
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P31c
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a = 11.161, c = 21.212
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2,288
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1.77
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Uniaxial (-) nω = 1.492(3) nε = 1.475(3)
Max birefringence δ = 0.017
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[3]
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Vitimite
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Ca6B14O19(SO4)(OH)14•5H2O
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monoclinic
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P2/m
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a = 14.10, b = 19.53, c = 14.05 β = 120.39°=4
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3,337
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Biaxial (-) nα = 1.532(3) nβ = 1.537(1) nγ = 1.540(1)
Max birefringence δ = 0.008
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[4]
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Harkerite
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Ca12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2O
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trigonal
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R3m
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a = 18.131 Å α = 33.46°
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1,614
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Uniaxial nα = 1.649 - 1.653 nβ = 1.649 - 1.653
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[5]
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Tatarinovite
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Ca3Al(SO4)[B(OH)4](OH)6 · 12H2O
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Hexagonal
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P63
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a = 11.1110, c = 10.6294
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1,136
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1.79
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colourless
Uniaxial (+) nω = 1.475 nε = 1.496
Max birefringence δ = 0.021
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[6]
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Sturmanite
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Ca6Fe3+2(SO4)2.5[B(OH)4](OH)12•25H2O
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trigonal
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P31c
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a = 11.16, c = 21.79 Z=2
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2,350
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yellow
Uniaxial (+/-) nω = 1.499 - 1.500 nε = 1.497 - 1.505
Max birefringence δ = 0.002
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[7]
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[Ni(atta)(SO4)0.5]·[B5O6(OH)4]
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514.13
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monoclinic
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P21/c
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a=9.0512 b=15.2776 c =15.0142, β=90.325° Z=4
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2076.14
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1.645
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[8]
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Buryatite
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Ca3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
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trigonal
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P31c
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a = 11.14, c = 20.99 Z=4
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2,256
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1.89
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Uniaxial (-) nω = 1.523(3) nε = 1.532(3)
Max birefringence δ = 0.009
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[9]
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Rb3H(SO4)2(B2O3)2
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hexagonal
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P63/m
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a = 6.502, c = 19.02 Z=2
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2.803
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[10]
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Fontarnauite
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Na2Sr(SO4)B5O8(OH)•2H2O
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monoclinic
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P21/c
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a=6.458 b=22.299 c=8.571 β=103.05 Z=4
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1,203
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|
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[11]
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Y(SO4)[B(OH)4](H2O)·H2O
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triclinic
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P1
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a=5.9679 b=6.8559 c=10.1698 α=79.608 β=76.673 γ=89.220 Z=2
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398.02
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2.502
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[12]
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Cs3H(SO4)2(B2O3)2
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hexagonal
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P63/m
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a = 6.5648, c = 19.5669 Z = 2
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3.322
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[10]
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La(SO4)[B(OH)4](H2O)
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331.83
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triclinic
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P1
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a=6.2808 b=6.8321 c=8.6830 α=82.475 β=76.758 γ=87.300 Z=2
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359.51
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3.065
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[12]
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Pr(SO4)[B(OH)4](H2O)2
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351.84
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monoclinic
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P21/m
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a=6.2359 b=9.5542 c=6.8236 β=93.852 Z=2
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405.64
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2.881
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[12]
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Nd(SO4)[B(OH)4](H2O)2
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355.17
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monoclinic
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P21/m
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a=6.2119 b=9.5328 c=6.7923 β=93.755 Z=2
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401.35
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2.939
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[12]
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Sm(SO4)[B(OH)4](H2O)
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343.27
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triclinic
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P1
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a=6.1467 b=6.7280 c=8.6068 α=81.769 β=76.653 γ=87.259 Z=2
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342.71
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3.326
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[12]
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Sm(SO4)[B(OH)4](H2O)2
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361.30
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monoclinic
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P21/m
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a=6.1601 b=9.5416 c=6.7589 β=93.816 Z=2
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396.39
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3.027
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[12]
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Eu(SO4)[B(OH)4](H2O)
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344.88
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triclinic
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P1
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a=6.1205 b=6.7090 c=8.5844 α=81.713 β=76.680 γ=87.294 Z=2
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339.40
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3.375
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[12]
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Eu(SO4)[B(OH)4](H2O)2
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362.89
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monoclinic
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P21/m
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a=6.1322 b=9.5139 c=6.7343 β=93.683 Z=2
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392.08
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3.074
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[12]
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Gd(SO4)[B(OH)4](H2O)2
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368.19
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monoclinic
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P21/m
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a=6.1148 b=9.5078 c=6.7164 β=93.611 Z=2
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389.70
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3.138
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[12]
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Tb(SO4)[B(OH)4](H2O)·H2O
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369.87
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triclinic
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P1
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a=6.0139 b=6.8972 c=10.1753 α=79.616 β=76.590 γ=89.106 Z=2
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403.42
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3.045
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[12]
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Dy(SO4)[B(OH)4](H2O)·H2O
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373.43
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triclinic
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P1
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a=5.9880 b=6.8728 c=10.1638 α=79.652 β=76.597 γ=89.153 Z=2
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400.12
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3.100
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[12]
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Ho(SO4)[B(OH)4](H2O)·H2O
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375.86
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triclinic
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P1
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a=5.9701 b=6.8570 c=10.1580 α=79.588 β=76.636 γ=89.193 Z=2
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397.75
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3.138
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[12]
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Er(SO4)[B(OH)4](H2O)·H2O
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378.19
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triclinic
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P1
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a=5.9529 b=6.8401 c=10.1553 α=79.598 β=76.642 γ=89.198 Z=2
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395.54
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3.175
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[12]
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Tm(SO4)[B(OH)4](H2O)·H2O
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379.86
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triclinic
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P1
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a=5.9289 b=6.8232 c=10.1422 α=79.531 β=76.663 γ=89.263 Z=2
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392.40
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3.215
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[12]
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Yb(SO4)[B(OH)4](H2O)·H2O
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383.97
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triclinic
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P1
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a=5.9150 b=6.8090 c=10.1454 α=79.541 β=76.669 γ=89.243 Z=2
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390.82
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3.263
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[12]
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Lu(SO4)[B(OH)4](H2O)·H2O
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385.91
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triclinic
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P1
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a=5.8992 b=6.7954 c=10.1322 α=79.551 β=76.691 γ=89.266 Z=2
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388.53
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3.299
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|
[12]
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Pb2[(BO2)(OH)](SO4)
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570.26
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monoclinic
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P21/m
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a=6.982 b=5.3917 c=8.167 β=98.643°
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303.9
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6.231
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decompose 335 °C; band gap 4.08
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[13]
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Pb4(BO3)2(SO4)
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1042.44
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monoclinic
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P21/c
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a=6.9363 b=15.8784 c=9.6053 β=110.770° Z=4
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989.15
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7.000
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melt 689 °C; band gap 4.03 eV
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[13][14]
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