Organic Salts: Difference between revisions
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In this overview the most frequently occurring salts with anions of organic acids are listed and . The various salt phases are discussed in detail on separate pages, their occurrence and their damage potential is explained and the deterioration patterns are there illustrated. <br> | In this overview the most frequently occurring salts with anions of organic acids are listed and the most relevant information, especially for their identification by microscopy, is provided. The various salt phases are discussed in detail on separate pages, their occurrence and their damage potential is explained and the deterioration patterns are there illustrated. <br> | ||
Revision as of 22:48, 9 December 2013
Author: Hans-Jürgen Schwarz
back to SaltWiki:Portal
In this overview the most frequently occurring salts with anions of organic acids are listed and the most relevant information, especially for their identification by microscopy, is provided. The various salt phases are discussed in detail on separate pages, their occurrence and their damage potential is explained and the deterioration patterns are there illustrated.
| Salt | Formula | Solubility at 20°C | Deliqueszenz-humidity | Light refraction | Birefringence | Notes |
|---|---|---|---|---|---|---|
| Dashkovaite | Mg(HCOO)2•2H2O | 140 g/l(0°C) | nx = 1.465 ny = 1.486 nz = 1.516 |
Δ = 0.050 | ||
| Formicaite | Ca(HCOO)2 | 162 g/l (0°C) | no = 1.553 ne = 1.573 |
Δ = 0.020 | ||
| Thecotrichite | Ca3(CH3COO)3Cl(NO3)2•7H2O | 85% (20°C) | nx = 1.491 ± 0.001 nz = 1.494 ± 0.003 |
found on calcareous museum objects and archaeological ceramic objects | ||
| Weddellite | Ca(C2O4)•2H2O | no = 1.523 ne = 1.544 |
Δ = 0.021 | insoluble in water | ||
| Whewellite | Ca(C2O4)•H2O | nx = 1.491 ny = 1.555 nz = 1.650 |
Δ = 0.159 | insoluble in water | ||
| Calclacite | Ca[Cl2/CH3COO]•10H2O CaCl2•Ca(C2H3O2)2•10H2O | nx = 1.468 ny = 1.484 nz = 1.515 |
Δ = 0.047 | found on calcareous museum objects and archaeological ceramic objects | ||
| Calcium acetate | Ca(C2H3O2)2 | 374 g/l (0°C) | found on calcareous museum objects and archaeological ceramic objects | |||
| Glushinskite | Mg(C2O4)•2(H2O) | nx =1.365 ny = 1.53 nz = 1.595 |
Δ = 0,2300 | Formed by reaction between Mg-rich minerals and oxalic acid secreted by incrusting lichen. |