Beryllium carbonate

Beryllium carbonate
Identifiers
13106-47-3 N
3D model (Jmol) Interactive image
ChemSpider 55490 YesY
ECHA InfoCard 100.032.740
PubChem 61577
RTECS number DS2350000
Properties
BeCO3
Melting point 54 °C (129 °F; 327 K)
Boiling point 100 °C (212 °F; 373 K)
decomposes
0.36 g/100 mL
Thermochemistry
65 J/mol·K[1]
52 J/mol·K[1]
-1025 kJ/mol[1]
-948 kJ/mol[1]
Hazards
Main hazards Irritant (Xi)
Lethal dose or concentration (LD, LC):
150 mg/kg (guinea pig)
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)[2]
REL (Recommended)
 Ca C 0.0005 mg/m3 (as Be)[2]
IDLH (Immediate danger)
 Ca [4 mg/m3 (as Be)][2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Beryllium carbonate is a chemical compound with the chemical formula BeCO3.

Structures

There are three forms reported, anhydrous, a tetrahydrate and basic beryllium carbonate. The anhydrous form is reported to be unstable, decomposing to BeO and carbon dioxide, and requiring storage under CO2.[3] The tetrahydrate is said to be formed when CO2 is bubbled through a solution of Be(OH)2 and is also reported to be similarly unstable.[4]

Preparation

Basic beryllium carbonate is a mixed salt, which can be prepared by the reaction of beryllium sulfate and ammonium carbonate, and contains both carbonate and hydroxide ions, with formula Be2CO3(OH)2.[5] It is believed that in the older literature this is probably what was referred to as beryllium carbonate.[5]

Safety

It may cause irritation. It should be handled carefully since several related beryllium compounds are known carcinogens.

References

  1. 1 2 3 4 http://chemister.ru/Database/properties-en.php?dbid=1&id=4246
  2. 1 2 3 "NIOSH Pocket Guide to Chemical Hazards #0054". National Institute for Occupational Safety and Health (NIOSH).
  3. ↑ Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5
  4. ↑ David Anthony Everest, 1964, The Chemistry of Beryllium, Elsevier Pub. Co.
  5. 1 2 J.E. Macintyre, Dictionary of Inorganic Compounds 1992 CRC Press ISBN 0-412-30120-2
Carbonates
H2CO3 He
Li2CO3,
LiHCO3		 BeCO3 B C (NH4)2CO3,
NH4HCO3		 O F Ne
Na2CO3,
NaHCO3,
Na3H(CO3)2		 MgCO3,
Mg(HCO3)2		 Al2(CO3)3 Si P S Cl Ar
K2CO3,
KHCO3		 CaCO3,
Ca(HCO3)2		 Sc Ti V Cr MnCO3 FeCO3 CoCO3 NiCO3 CuCO3 ZnCO3 Ga Ge As Se Br Kr
Rb2CO3 SrCO3 Y Zr Nb Mo Tc Ru Rh Pd Ag2CO3 CdCO3 In Sn Sb Te I Xe
Cs2CO3,
CsHCO3		 BaCO3   Hf Ta W Re Os Ir Pt Au Hg Tl2CO3 PbCO3 (BiO)2CO3 Po At Rn
Fr Ra   Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
↓
La2(CO3)3 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Ac Th Pa UO2CO3 Np Pu Am Cm Bk Cf Es Fm Md No Lr
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