HOME
FOTO ATLAS
SYSTEMATIK


MINERAL CLASSIFICATION / SYSTEMATIK der MINERALE

           based on E.H. Nickel & M.C. Nichols (2009), H. Strunz & E.H. Nickel (2001)



6. BORATES



6.E: Pentaborates


6.EA. Neso-pentaborates
 
6.EA.05. Sborgite group (4 Δ + 1 Tetrahedron)
 
Sborgite NaB5O6(OH)4·3H2O mon., C2/c G


 
6.EA.10. Santite group (4 Δ + 1 Tetrahedron)
 
Santite KB5O6(OH)4·2H2O orth., Aba2 IMA 1969-044
Ramanite-(Rb) RbB5O6(OH)4·2H2O orth., Aba2 IMA 2007-006
Ramanite-(Cs) CsB5O6(OH)4·2H2O mon., C2/c IMA 2007-007


 
6.EA.15. Ammonioborite (4 Δ + 1 Tetrahedron )
 
Ammonioborite (NH4)3B15O20(OH)8·4H2O mon., C2/c G


 
6.EA.20. Group reserved (3 Δ + 2 Tetrahedra)
 


 
6.EA.25. Ulexite (2 Δ + 3 Tetrahedra)
 
Ulexite NaCaB5O6(OH)6·5H2O tric., P-1 FOTO G



 
 
6.EB. Ino-pentaborates
 
6.EB.05. Larderellite group (4 Δ + 1 Tetrahedron)
 
Yarzhemskiite KB5O7(OH)2·H2O mon., P21/c IMA 2018-019
Larderellite NH4B5O7(OH)2·H2O mon., P21/c FOTO G


 
6.EB.10. Ezcurrite (3 Δ + 2 Tetrahedra)
 
Ezcurrite Na2B5O7(OH)3·2H2O tric., P-1 G


 
6.EB.15. Probertite (2 Δ + 3 Tetrahedra)
 
Probertite NaCaB5O7(OH)4·3H2O mon., P21/a FOTO G


 
6.EB.20. Tertschite
 
Tertschite Ca4B10O19·20H2O mon. (?)


 
6.EB.25. Priceite
 
Priceite Ca2B5O7(OH)5·H2O tric. FOTO G



 
 
6.EC. Phyllo-pentaborates
 
6.EC.05. Biringuccite group (3 Δ + 2 Tetrahedra)
 
Biringuccite Na2B5O8(OH)·H2O mon., P21/c A
Nasinite Na2B5O8(OH)·2H2O orth., Pna21 A


 
6.EC.10. Gowerite group (3 Δ + 2 Tetrahedra + 1 Δ)
 
Gowerite Ca(B5O8(OH))(B(OH)3)·3H2O mon., P21/a A


 
6.EC.15. Veatchite group (3 Δ + 2 Tetrahedra + 1 Δ)
 
Calcioveatchite CaSr(B5O8(OH))2(B(OH)3)·H2O mon., P21 IMA 2020-011
Veatchite Sr2(B5O8(OH))2(B(OH)3)·H2O mon., Cc FOTO G

Veatchite polytypes: Veatchite-1M (mon., P21, originally described as Veatchite-P), Veatchite-2M (mon, Aa), Veatchite-A (tric., A-1 or A1, originally described as a mineral, IMA 1978-030).


 
6.EC.20. Volkovskite (3 Δ + 2 Tetrahedra + 1 Δ)
 
Volkovskite KCa4(B5O8(OH))4(B(OH)3)2Cl·4H2O tric., P1 A


 
6.EC.25. Fontarnauite (3 Δ + 2 Tetrahedra)
 
Fontarnauite (Na,K)2(Sr,Ca)(SO4)2[B5O8(OH)](H2O)2 mon., P21/c IMA 2009-096a


 
6.EC.30. Tuzlaite (2 Δ + 3 Tetrahedra + 1 Δ)
 
Tuzlaite CaNa(B5O8(OH)2)·3H2O mon., P21/c IMA 1993-022


 
6.EC.35. Heidornite
 
Heidornite Ca3Na2(B5O8(OH)4)(SO4)2Cl mon., C2/c FOTO G


 
6.EC.40. Brianroulstonite group
 
Brianroulstonite Ca3B5O6(OH)6)(OH)Cl2(OH)·8H2O mon., Pn (Pa) IMA 1996-009
Popugaevaite Ca3B5O6(OH)6)FCl2(OH)·8H2O mon., Pn IMA 2019-115



 
 
6.ED. Tekto-pentaborates
 
6.ED.05. Hilgardite group (2 Δ + 3 Tetrahedra)
 
Hilgardite Ca2B5O9Cl·H2O tric., P1 G
Kurgantaite CaSrB5O9Cl·H2O tric., P1 Rd
Tyretskite Ca2B5O9(OH)·H2O tric., P1 A
Leucostaurite Pb2B5O9Cl·0.5H2O orth., Pnn2 IMA 2007-047

Hilgardite polytypes: Hilgardite-1A (tric., P1), Hilgardite-3A (tric., P1), Hilgardite-4M (mon., Aa).



 
 

G = Grandfathered minerals: original description preceded the establishment of the CNMNC in 1959, and generally regarded as a valid species
A or IMA No. = Minerals approved by the CNMNC
Rd = Redefinition of the mineral approved by the CNMNC
Rn = Renamed with approval by the CNMNC
Q = Questionable mineral


© Thomas Witzke (2007-2020)


HOME
FOTO ATLAS
SYSTEMATIK