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MINERAL CLASSIFICATION / SYSTEMATIK der MINERALE

           according to E.H. Nickel & M.C. Nichols (2009), H. Strunz & E.H. Nickel (2001)



6. BORATES



6.D: Tetraborates



6.DA. Neso-tetraborates
 
6.DA.05. - (group reserved) (4 Δ), (3 Δ + Tetrahedra)
 

 
6.DA.10. Borax group (2 Δ + 2 Tetrahedra)
 
Borax Na2B4O5(OH)4 8 H2O mon., C2/c G

 
6.DA.15. Tincalconite group (2 Δ + 2 Tetrahedra)
 
Tincalconite Na2B4O5(OH)4 3 H2O trig., R32 G

 
6.DA.20. Hungchaoite group (2 Δ + 2 Tetrahedra)
 
Hungchaoite MgB4O5(OH)4 7 H2O tric., P-1 A

 
6.DA.25. Fedorovskite group (2 Δ + 2 Tetrahedra)
 
Fedorovskite Ca2Mg2B4O7(OH)6 orth., Pbam IMA 1975-006
Roweite Ca2Mn2B4O7(OH)6 orth., Pbam G

 
6.DA.30. Hydrochlorborite group (Δ + 2 Tetrahedra + Tetrahedron)
 
Hydrochlorborite Ca2B4O4(OH)7Cl 7 H2O mon., I2/a G

 
6.DA.35. Uralborite group (3 Tetrahedra + Tetrahedron)
 
Uralborite Ca2B4O4(OH)8 mon., P21/n A

 
6.DA.40. Borcarite group (4 Tetrahedra)
 
Borcarite Ca4MgB4O6(OH)6(CO3)2 mon., C2/m A
Numanoite Ca4CuB4O6(OH)6(CO3)2 mon., B2/m IMA 2005-050





 
6.DB. Ino-tetraborates
 
6.DB.05. Kernite group (2 Δ + 2 Tetrahedra)
 
Kernite Na2B4O6(OH)2 3 H2O mon., P21/a G


 
6.DC. Phyllo-tetraborates (no examples known)
 


 
6.DD. Tekto-tetraborates
 
6.DD.05. Diomignite group (2 Δ + 2 Tetrahedra)
 
Diomignite Li2B4O7 tetr., I41cd IMA 1984-058





in bold: grandfathered, IMA accepted, renamed and redefined (with IMA approval) minerals,
in normal letters: minerals published without IMA approval, questionable minerals, polytypes


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
GROUP = a name used to designate a group of species
N = Mineral published without approval of the CNMNC
Q = Questionable mineral
H = Hypothetical mineral (synthetic, anthropogenic, etc.)
D = Discredited by the CNMNC
Poly = Polytype



© Thomas Witzke / Stollentroll (2007-2010)


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