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Mangaan(II)karbonaat

Eienskappe

Algemeen

Naam Mangaan(II)karbonaat
Struktuurformule van
Struktuurformule van
Chemiese formule MnCO3
Molêre massa 114,947 [g/mol][1]
CAS-nommer 598-62-9[1]  
Voorkoms rose kristalle wat ligbruin verkleur[1]
Fasegedrag  
Selkonstantes romb.: a= 584 pm; α=47,77 ° [2]; heks.: a=477,77pm; c=1566,4pm [3]  
Ruimtegroep R3
Nommer 167  
Strukturbericht G0₁
Smeltpunt ontbind >200C[1]
Kookpunt
Digtheid 2,6 [1]
Oplosbaarheid amper onoplosbaar; 0,065 g/L @ 25 C[1] 
Ksp 8,8 10-11 in water[1]

Suur-basis eienskappe

pKa

Veiligheid

Flitspunt nie-brandbaar

Tensy anders vermeld is alle data vir standaardtemperatuur en -druk toestande.

 
Portaal Chemie

Mangaan(II)karbonaat is 'n sout van mangaan in sy 2+ oksidasietoestand en koolsuur met chemiese formule MnCO3. Dit word in die natuur as die mineraal rodochrosiet aangetref. Dit is onoplosbaar in etanol. Dit los op in verdunde anorganiese sure, maar nie in die meeste organiese sure nie. Die varse neerslag is ligpienk maar blootgestel aan die lug verkleur dit bruin.[1]

Kristalstruktuur

[wysig | wysig bron]

Mangaan(II)karbonaat kristalliseer in die kalsiet-struktuur[1] (G01 in die strukturbericht-klassifikasie). Mangaan- en kalsiumkarbonate vorm 'n volledige reeks mengkristalle MnxCa1-xCO3 met die kalsietstruktuur. Die logKsp, die logaritme van die oplosbaarheidsproduk, neem amper lineêr af met die waarde van x. [4]

Verwysings

[wysig | wysig bron]
  1. 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 "MSDS". Pubchem NIh. Besoek op 22 September 2023.
  2. "Crystal structure of manganese carbonate". Crystallography.
  3. Donald L. Graf (1961). "CRYSTALLOGRAPHIC TABLES FOR THE RHOMBOHEDRAL CARBONATES". THE AMERICAN MINERALOGIST. 46.((cite journal)): AS1-onderhoud: gebruik authors-parameter (link)
  4. Sangbo Son, Aric G. Newton, Kyoung-nam Jo, Jin-Yong Lee, Kideok D. Kwon (2019). "Manganese speciation in Mn-rich CaCO3: A density functional theory study". Geochimica et Cosmochimica Acta. 248: 231–241. doi:10.1016/j.gca.2019.01.011.((cite journal)): AS1-onderhoud: gebruik authors-parameter (link)
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Mangaan(II)karbonaat
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