Editing Borate (section)

== Anions ==
The main borate anions are:
* [[tetrahydroxyborate]] {{chem2|[B(OH)4]-}}, found in [[sodium tetrahydroxyborate]] {{chem2|Na[B(OH)4]}}.
* [[orthoborate]] {{chem2|[BO3](3-)}}, found in [[trisodium orthoborate]] {{chem2|Na3[BO3]}}
* {{chem|[BO|4|]|5-}}, found in  the calcium yttrium borosilicate oxyapatite {{chem|Ca|3|Y|7|BO|4|(|SiO|4|)|5|O}}
* [[perborate]] {{chem2|[B2O4(OH)4](2-)}}, as in [[sodium perborate]] {{chem2|Na2[H4B2O8]}}
* [[metaborate]] {{chem2|[BO2]-}} or its cyclic trimer {{chem2|[B3O6](3-)}}, found in [[sodium metaborate]] {{chem2|Na3[B3O6]}}
* [[diborate]] {{chem2|[B2O5](4-)}}, found in [[Suanite|magnesium diborate (suanite)]] {{chem2|Mg2[B2O5]}} ,
* [[triborate]] {{chem2|[B3O7](5-)}}, found in [[calcium aluminium triborate|calcium aluminium triborate (johachidolite)]] {{chem2|Ca[AlB3O7]}} ,
* [[tetraborate]] {{chem2|[B4O7](2-)}}, found in anhydrous [[borax]] {{chem2|Na2[B4O7]}}
* [[tetraborate|tetrahydroxytetraborate]] {{chem2|[B4O5(OH)4](2-)}}, found in borax "decahydrate" {{chem2|Na2[B4O5(OH)4]*8H2O}}
* [[tetraborate(6-)]] {{chem2|[B4O9](6-)}}, found in [[lithium tetraborate(6-)]] {{chem2|Li6[B4O9]}}
* [[pentaborate]] {{chem2|[B5O8]-}} or {{chem2|[B10O16](2-)}}, found in [[sodium pentaborate]] {{chem2|Na2[B10O16]*10H2O}}
* [[octaborate]] {{chem2|[B8O13](2-)}}, found in [[disodium octaborate]] {{chem2|Na2[B8O13]}}

{{Gallery
| title = Borate ions
| height = 175
| align = center
| File:Tetrahydroxyborate-2D-dimensions.png
| The structure of the tetrahydroxyborate ion ({{chem2|[B(OH)4]−}}). This anion has a [[tetrahedral molecular geometry]] at the boron atom.
| alt1 = The structure of the tetrahydroxyborate ion
| File:Orthoborate ion.png
| The structure of the orthoborate ion ({{chem2|[BO3](3−)}}). This anion has a [[trigonal planar molecular geometry]].
| alt2 = The structure of the orthoborate ion
| File:Metaborate ion trimer.png
| The structure of the trimer of the metaborate ion ({{chem2|[B3O6](3−)}}). This anion is a [[Cyclic compound|cyclic]] molecule and has a trigonal planar molecular geometry at the boron atoms. All nine atoms of this anion lie on the same plane.
| alt3 = The structure of the trimer of the metaborate ion
| File:Tetrahydroxytetraborate ion.png
| The structure of the tetrahydroxytetraborate ion ({{chem2|[B4O5(OH)4](2-)}}). This anion is a [[Bicyclic molecule|bridged bicyclic]] molecule, contains [[oxygen]] atoms bridging the [[boron]] atoms, which are linked to four [[hydroxyl]] groups ({{chem2|\sOH}}), one per each boron atom. The anion has a tetrahedral molecular geometry at the two [[Coordination geometry#Table of coordination geometries|tetracoordinated]] boron atoms. It has a trigonal planar molecular geometry at the two [[Coordination geometry#Table of coordination geometries|tricoordinated]] boron atoms.
| alt4 = The structure of the tetrahydroxytetraborate ion
| File:Tetraborate ion.png
| The structure of the tetraborate ion ({{chem2|[B4O7](2-)}}). This anion has the same [[topology]] as the tetrahydroxytetraborate ion, but without the hydroxyl groups and all boron atoms have a trigonal planar molecular geometry.<ref name=pubchem>{{cite web | url=https://pubchem.ncbi.nlm.nih.gov/compound/Tetraborate | title=Tetraborate }}</ref>
| alt5 = The structure of the tetrahydroxyborate ion
| File:Perborate ion.png
| The structure of the perborate ion ({{chem2|[B2O4(OH)4](2-)}}). This anion is a [[Cyclic compound|cyclic]] molecule with a tetrahedral molecular geometry at the boron atoms. It contains two bridging peroxide groups ({{chem2|\sO\sO\s}}) and four hydroxyl groups ({{chem2|\sOH}}) attached to boron atoms, two per each boron. The ring has a [[chair conformation]].<ref name="carrondo1978"/>
| alt6 = The structure of the perborate ion
| File:Octaborate ion.png
| The structure of the repeating unit of the octaborate ion ({{chem2|[B8O13](2-)}}) in the alpha form of [[disodium octaborate]] (α-{{chem2|Na2[B8O13]}}).<ref name="bubnova2002"/> This anion is cyclic and [[polymeric]]. It has a tetrahedral molecular geometry at the negatively charged boron atoms and a trigonal planar molecular geometry at the neutral boron atoms.
| alt7 = The structure of the repeating unit of the octaborate ion in the alpha form of disodium octaborate
}}