Welcome
Electrons rush in
Cathodoluminescence
And the glow begins
Dr. Donald Marshall, principal of RELION Industries, LLC, passed away in May 2026, at the age of 93, having previously retired in 2025 from the business of manufacturing the RELIOTRON cold-cathode "optical" cathodoluminescence system. His associate since 2022, Dr. Timothy Allen, is continuing on in the business of manufacturing, selling, and servicing of cathodoluminescence petrography systems and accessories, under the business name Relion Scientific LLC.
For inquiries about purchasing new or refurbished CL instruments, or service, repair, or parts for CL instruments (RELIOTRON, LUMINOSCOPE, and others), please contact Dr. Allen at:
tim@relionscientific.com,
or +1-603-209-9222 (voice or text),
or visit http://relionscientific.com/.
Company Profile
RELION Industries, LLC, was located in Bedford, Massachusetts, USA, just outside the city of Boston. The principal, Dr. Donald J. Marshall, had been associated with cathodoluminescence instrumentation and with the applications of CL in geology, archaeology, ceramics and glass industry, and phosphor research for many, many years.
RELION offered CL instrumentation — the RELIOTRON — and also provided servicing and spare parts for the CL instruments provided by most other manufacturers.
The RELIOTRON, servicing, and parts, are now provided by Relion Scientific LLC, the successor to RELION Industries, LLC, located in Hillsborough, New Hampshire, USA.
About Dr. Timothy Allen
Tim holds a PhD and an MS in Geology from Dartmouth College and a BA in Geological Sciences from Harvard University, and has served as Professor and Department Head at Keene State College. While working with Don, he participated fully in instrument assembly, testing, installation, and servicing, and also provided a fresh set of eyes into possible design changes.
About Dr. Donald Marshall
Dr. Marshall was the author of the definitive text on cathodoluminescence, Cathodoluminescence of Geological Materials (with a chapter contributed by Dr. Anthony Mariano). Dr. Marshall had presented at conferences all over the world.
Reprints of the book continue to be available through Relion Scientific LLC.
View the PowerPoint presentation of The Technique of Macrophotography in Cathodoluminescence Studies.
