Skip to main content

Reset your password

Please enter the e-mail address you used to register to reset your password

Note: The verification e-mail to change your password should arrive immediately. However, in some cases it takes longer. Don't forget to check your spam folder.

If you haven't received the e-mail in 24 hours, please contact customerservices@ioppublishing.org

Registration complete

Thank you for registering with Physics World
If you'd like to change your details at any time, please visit My account

Close
Chemical processes

Chemical processes

Solving the mystery of the Alhambra’s purple gold

29 Oct 2022 James Dacey
Photo of muqarnas - tiny, arched cavities nested together like a honeycomb - at the Alhambra, showing the purple discolouration on the surface.
Not born to the purple: discoloured muqarnas decorations within an arch leading to the entrance of the Hall of the Kings, which is part of the Palace of the Lions section of the Alhambra complex. Note the abundant remains of purple colour and gilded tin. (Courtesy: C Cardell and I Guerra/University of Granada, Spain)
Overlooking the city of Granada in southern Spain, the Alhambra palace and fortress is an icon of th

You’ve reached the limit of what you can view on Physics World without registering

If you already have an account on Physics World, then please sign in to continue reading

If you do not yet have an account, please register so you can

  • Access more than 20 years of online content
  • Choose which e-mail newsletters you would like to receive
James Dacey is a multimedia journalist based in Madrid
Read previous

Proton’s puzzling electromagnetic structure is observed in new experiment
Read next

Tiny beam shaper fabricated on the tip of a fibre creates twisted light

Discover more from Physics World

Related jobs

Related events

Copyright © 2024 by IOP Publishing Ltd and individual contributors