Tetrafluoroberyllate

Tetrafluoroberyllate
Names
	IUPAC name Tetrafluoroberyllate(2−)
	Systematic IUPAC name Tetrafluoroberyllate(2−)
	Other names Tetrafluoroberyllate
Identifiers
CAS Number	18539-20-3 ;
3D model (JSmol)	: Interactive image; : Interactive image;
ChEBI	CHEBI:30497 ;
ChemSpider	15238330;
Gmelin Reference	2035
PubChem CID	5834288;
UNII	NL2E2HZ73G ;
	InChI InChI=1S/Be.4FH/h;41H/q+2;;;;/p-4 Key: UUMYFIKVCFICLB-UHFFFAOYSA-J; InChI=1S/Be.4FH/h;41H/q+2;;;;/p-4 Key: UUMYFIKVCFICLB-UHFFFAOYSA-J;
	SMILES : [Be-2](F)(F)(F)F; : F[Be--](F)(F)F;
Properties
Chemical formula	[BeF4]2−
Molar mass	85.0057958 g·mol−1
Structure
Point group	Td
Molecular shape	tetrahedral
Related compounds
Related isoelectronic	Tetrafluoroborate [BF4]−; Tetrafluoromethane CF4; Tetrafluoroammonium [NF4]+;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tetrafluoroberyllate or orthofluoroberyllate is an anion with the chemical formula [Be F₄]²⁻. It contains beryllium and fluorine. This fluoroanion has a tetrahedral shape, with the four fluorine atoms surrounding a central beryllium atom. It has the same size, charge, and outer electron structure as sulfate S O2−4. Therefore, many compounds that contain sulfate have equivalents with tetrafluoroberyllate. Examples of these are the langbeinites, and Tutton's salts.