Russian Mineralogical Society
2nd International Conference "Crystallogenesis and Mineralogy"
Experimental modelling of replacement of calcite and marble by gypsum in connection with a problem of city monuments protection

RMS-DPI code:  2007-1-67-0
Scientific session:  Session 3. Synthesis of crystalline materials and experimental mineralogy
Author listing:  Sinay M.Yu., Mosyagin A.V., Timasheva M.A., Esipova I.V., Frank-Kamenetskaya O.V.
Principal author:  Sinay Marina
Language:  Russian
Abstract - Summary 
(short description):
Calcite and marble replacement by gypsum is one of the most dangerous destructive processes for city monuments. Details of this process and mechanisms of transformation of SO2 to [SO4]2- on building surfaces have been investigated. Modelling experiment has shown that gypsum growth on calcite occurs if solutions contains [SO4]2- as well as [SO3]2- ions. The supposed scheme of the process is: 1) SO2+H2O = H2SO3; 2) 2CaCO3 + 2H2SO3 + O2 = 2CaSO4 + 2H2O + 2CO2. An additional factor influenced morphology of gypsum crystals can be chlorides or organic acids in solutions.
 
RMS-DPI code:  2007-1-67-0
Proceeedings volume 
in the RMS catalogue:
 
Crystallogenesis and Mineralogy
Pages:  129-131
File of proceedings 
(PDF): 
 361 K
Status:  printed
Recieved:  15/05/2007
Accepted:  16/05/2007
Published on-line:  05/01/2008
Permanent address of publication:  http://www.minsoc.ru/2007-1-67-0/
Contact author(s):  Sinay, Marina

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