On the formation of hörnesite in a Fatimid manuscript folio
Abstract A folio fragment attributed to the Fatimid period in Egypt was found to bear tufts of white crystals associated with the orange-brown and yellow paints. Raman spectroscopy identified a mixture of arsenic sulfide-based pigments in the orange-brown and yellow areas, along with vermilion in th...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-09-01
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| Series: | Heritage Science |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s40494-018-0221-2 |
| _version_ | 1818611068211036160 |
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| author | Yana van Dyke Silvia A. Centeno Federico Carò James H. Frantz Mark T. Wypyski |
| author_facet | Yana van Dyke Silvia A. Centeno Federico Carò James H. Frantz Mark T. Wypyski |
| author_sort | Yana van Dyke |
| collection | DOAJ |
| description | Abstract A folio fragment attributed to the Fatimid period in Egypt was found to bear tufts of white crystals associated with the orange-brown and yellow paints. Raman spectroscopy identified a mixture of arsenic sulfide-based pigments in the orange-brown and yellow areas, along with vermilion in the outlines of the figures. X-ray microdiffraction, Raman spectroscopy, and energy-dispersive X-ray spectrometry identified the white crystals as hörnesite [Mg3(AsO4)2·8H2O]. Synthesis of this compound at ambient temperature and elevated relative humidity over a period of 3 years, on paper painted with arsenic sulfide pigments and treated with magnesium carbonate, suggests the possibility that a magnesium-based deacidification treatment may have contributed to the formation of this phase on the folio fragment. This work highlights the potential damage that may be sustained by arsenic sulfide-based media through exposure to deacidifying suspensions such as the ones often used in the past to treat works of art on paper and historic documents. |
| first_indexed | 2024-12-16T15:24:27Z |
| format | Article |
| id | doaj.art-727e6fdca31249eb9fb8854e4ed57138 |
| institution | Directory Open Access Journal |
| issn | 2050-7445 |
| language | English |
| last_indexed | 2024-12-16T15:24:27Z |
| publishDate | 2018-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Heritage Science |
| spelling | doaj.art-727e6fdca31249eb9fb8854e4ed571382022-12-21T22:26:33ZengSpringerOpenHeritage Science2050-74452018-09-01611910.1186/s40494-018-0221-2On the formation of hörnesite in a Fatimid manuscript folioYana van Dyke0Silvia A. Centeno1Federico Carò2James H. Frantz3Mark T. Wypyski4Department of Paper Conservation, The Metropolitan Museum of ArtDepartment of Scientific Research, The Metropolitan Museum of ArtDepartment of Scientific Research, The Metropolitan Museum of ArtDepartment of Scientific Research, The Metropolitan Museum of ArtDepartment of Scientific Research, The Metropolitan Museum of ArtAbstract A folio fragment attributed to the Fatimid period in Egypt was found to bear tufts of white crystals associated with the orange-brown and yellow paints. Raman spectroscopy identified a mixture of arsenic sulfide-based pigments in the orange-brown and yellow areas, along with vermilion in the outlines of the figures. X-ray microdiffraction, Raman spectroscopy, and energy-dispersive X-ray spectrometry identified the white crystals as hörnesite [Mg3(AsO4)2·8H2O]. Synthesis of this compound at ambient temperature and elevated relative humidity over a period of 3 years, on paper painted with arsenic sulfide pigments and treated with magnesium carbonate, suggests the possibility that a magnesium-based deacidification treatment may have contributed to the formation of this phase on the folio fragment. This work highlights the potential damage that may be sustained by arsenic sulfide-based media through exposure to deacidifying suspensions such as the ones often used in the past to treat works of art on paper and historic documents.http://link.springer.com/article/10.1186/s40494-018-0221-2HörnesiteRealgarPararealgarFatimid manuscriptDeacidification |
| spellingShingle | Yana van Dyke Silvia A. Centeno Federico Carò James H. Frantz Mark T. Wypyski On the formation of hörnesite in a Fatimid manuscript folio Heritage Science Hörnesite Realgar Pararealgar Fatimid manuscript Deacidification |
| title | On the formation of hörnesite in a Fatimid manuscript folio |
| title_full | On the formation of hörnesite in a Fatimid manuscript folio |
| title_fullStr | On the formation of hörnesite in a Fatimid manuscript folio |
| title_full_unstemmed | On the formation of hörnesite in a Fatimid manuscript folio |
| title_short | On the formation of hörnesite in a Fatimid manuscript folio |
| title_sort | on the formation of hornesite in a fatimid manuscript folio |
| topic | Hörnesite Realgar Pararealgar Fatimid manuscript Deacidification |
| url | http://link.springer.com/article/10.1186/s40494-018-0221-2 |
| work_keys_str_mv | AT yanavandyke ontheformationofhornesiteinafatimidmanuscriptfolio AT silviaacenteno ontheformationofhornesiteinafatimidmanuscriptfolio AT federicocaro ontheformationofhornesiteinafatimidmanuscriptfolio AT jameshfrantz ontheformationofhornesiteinafatimidmanuscriptfolio AT marktwypyski ontheformationofhornesiteinafatimidmanuscriptfolio |