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Fig. 7 | Heritage Science

Fig. 7

From: On the formation of hörnesite in a Fatimid manuscript folio

Fig. 7

a Photomicrograph of white crystals grown after 3 years on a mixture of orpiment, realgar and pararealgar applied on Whatman® filter paper and treated with a MgCO3 suspension. Visible illumination, original magnification ×10. b Integrated XRD pattern of the white crystals formed on the sample shown in a, with line patterns of arsenolite and hörnesite

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