according to E.H. Nickel & M.C. Nichols (2009), H. Strunz & E.H. Nickel (2001)
6. BORATES
6.G: Heptaborates and other Megaborates
| 6.GA. Tekto-heptaborates | |||||||||||||||||
| 6.GA.05. Boracite group | |||||||||||||||||
| Boracite | Mg3B7O13Cl | orth., Pca21 | FOTO | G | |||||||||||||
| Ericaite | Fe3B7O13Cl | orth., Pca21 | FOTO | G | |||||||||||||
| Chambersite | Mn3B7O13Cl | orth., Pca21 | A | ||||||||||||||
| 6.GA.10. Trembathite group | |||||||||||||||||
| Trembathite | Mg3B7O13Cl | trig., R-3c | IMA 1991-018 | ||||||||||||||
| Congolite | Fe3B7O13Cl | trig., R-3c | IMA 1971-030 | ||||||||||||||
| |||||||||||||||||
| 6.GB. Phyllo-nonaborates, etc. | |||||||||||||||||
| 6.GB.05. Studenitsite group (4 Δ + 5 Tetrahedra) | |||||||||||||||||
| Studenitsite | NaCa2B9O14(OH)4 · 2 H2O | mon., P21/c | IMA 1994-026 | ||||||||||||||
| 6.GB.10. Penobsquisite group (4 Δ + 5 Tetrahedra) | |||||||||||||||||
| Penobsquisite | Ca2FeB9O13(OH)6Cl · 4 H2O | mon., P21 | IMA 1995-014 | ||||||||||||||
| 6.GB.15. Preobrazhenskite group (4 Δ + 5 Tetrahedra + 2 Tetrahedra) | |||||||||||||||||
| Preobrazhenskite | Mg3B11O15(OH)9 | orth., Pbcn | G | ||||||||||||||
| 6.GB.20. Walkerite group | |||||||||||||||||
| Walkerite | Ca3(Mg,Li)2(B13O17(OH)12)4Cl6 · 28 H2O | orth., Pba2 | IMA 2001-051 | ||||||||||||||
| |||||||||||||||||
| 6.GC. Tekto-dodecaborates, etc. | |||||||||||||||||
| 6.GC.05. Rhodizite group (12 Tetrahedra) | |||||||||||||||||
| Rhodizite | KAl4Be4B11BeO24O4 | cub., P-43m | G | ||||||||||||||
| Londonite | CsAl4Be4B11BeO24O4 | cub., P-43m | IMA 1999-014 | ||||||||||||||
| |||||||||||||||||
| 6.GD. Mega-Tektoborates | |||||||||||||||||
| 6.GD.05. Pringleite group (12 Δ + 14 Tetrahedra) | |||||||||||||||||
| Pringleite | Ca9B26O34(OH)24Cl4 · 13 H2O | tric., P1 | IMA 1992-010 | ||||||||||||||
| Ruitenbergite | Ca9B26O34(OH)24Cl4 · 13 H2O | mon., P21 | IMA 1992-011 | ||||||||||||||
| 6.GD.10. Metaborite group | |||||||||||||||||
| Metaborite | HBO2 | cub., P-43n | A | ||||||||||||||
| Metaborite | HBO2 | mon., P21/a | A | ||||||||||||||
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)
