Question

Beryllium atom in beryllium flouride is

Answer 1

Beryllium fluoride is the inorganic compoundwith the formula BeF2. This white solid is the principal precursor for the manufacture of beryllium metal. Its structure resembles that of quartz, but BeF2 is highly soluble in water.

Beryllium fluorideNamesIUPAC name

Beryllium fluoride

Other names

Beryllium difluoride
Difluoroberyllane

Identifiers

CAS Number

7787-49-7 

3D model (JSmol)

Interactive image

ChEBI

CHEBI:49499 

ChemSpider

22992 

ECHA InfoCard100.029.198

PubChem CID

24589

RTECS numberDS2800000

InChI

InChI=1S/Be.2FH/h;2*1H/q+2;;/p-2 

Key: JZKFIPKXQBZXMW-UHFFFAOYSA-L 

InChI=1/Be.2FH/h;2*1H/q+2;;/p-2

Key: JZKFIPKXQBZXMW-NUQVWONBAD

SMILES

[Be+2].[F-].[F-]

Properties

Chemical formula

BeF2Molar mass47.01 g/mol 
hygroscopicAppearancecolorless lumpsDensity1.986 g/cm3Melting point554 °C (1,029 °F; 827 K)Boiling point1,169 °C (2,136 °F; 1,442 K)[1]

Solubility in water

very solubleSolubilitysparingly soluble in alcoholStructure

Crystal structure

Trigonal, α-quartz

Space group

P3121 (No. 152), Pearson symbol hP9[2]

Lattice constant

a = 473.29 pm, c = 517.88 pm

Molecular shape

LinearThermochemistry

Heat capacity (C)

1.102 J/K or 59 J/mol K

Std molar
entropy (So298)

45 J/mol K

Std enthalpy of
formation (ΔfHo298)

-1028.2 kJ/g or -1010 kJ/mol

Gibbs free energy(ΔfG˚)

-941 kJ/molHazards[5]Safety data sheetInChem MSDSGHS pictogramsGHS signal wordDANGER

GHS hazard statements

H301, H305, H311, H314, H315, H319, H330, H335, H372, H411

GHS precautionary statements

P201, P202, P260, P264, P270, P271, P273, P280, P281, P284, P301+310, P301+330+331, P302+352, P303+361+353, P304+340, P305+351+338, P308+313, P310, P312, P314, P320, P321, P322, P330, P361Flash pointNon-flammableLethal dose or concentration (LD, LC):

LD50 (median dose)

90 mg/kg (oral, rat)
100 mg/kg (oral, mouse)[4]US health exposure limits (NIOSH):

PEL (Permissible)

TWA 0.002 mg/m3
C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)[3]

REL (Recommended)

Ca C 0.0005 mg/m3 (as Be)[3]

IDLH (Immediate danger)

Ca [4 mg/m3 (as Be)][3]Related compounds

Other anions

Beryllium chloride
Beryllium bromide
Beryllium iodide

Other cations

Magnesium fluoride
Calcium fluoride
Strontium fluoride
Barium fluoride
Radium fluoride

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