Powder pattern Indexing and Rietveld structural refinement techniques are complementary and are often combined to determine the structure of a material. Successful indexing of a powder pattern is considered strong evidence for phase purity.
A good quality meeting that was well worth attending.
Indexing (with derived space group and lattice symmetry determinations) is considered a prelude to determining the crystal structure, and permits phase identification by lattice matching techniques. The Rietveld method is used to refine crystal structures and is perhaps best considered whole- pattern-fitting structure refinement, i.e., we must account not only for the crystal structure but also the instrumental resolution and diffraction physics effects (e.g., crystallite size and strain). The aim is to perform quantitative phase analysis and identification.
This clinic introduces the theory and formalisms of various indexing methods and structural refinement techniques. One unique aspect of this clinic is the extensive use of computer laboratory problem solving and exercises that teach method development in a hands-on environment. We will use EXPGUI and GSAS for the Rietveld laboratory work; Crysfire (especially Dicvol, Ito and Treor) will be used for indexing exercises.
The format of the clinic is a combination of morning lectures and afternoon computer lab exercises. Ample opportunity for individual student-faculty interaction exists throughout the week.
when & where
- Emphasis on space groups, conventions, etc.
Powder Pattern Indexing
- Data reduction methods for peak finding
- We will use Dicvol 04, Treor and Ito indexing examples
- Crysfire will also be discussed
Rietveld Structural Refinement
- History and motivation for development of this technique
- Qualitative description of various sample and instrument-related functions for profile shape, background, etc.
- The use of least-squares constraints will be explored
LeBail and Pawley Fitting Procedures
- What to do when atomic coordinates are not available
- Discussion on use of these tools for structure determination
- Use in powder pattern indexing
Computer Lab Components
Exercise problems will include:
- Single phase indexing
- Single phase refinement (all crystalline materials)
- Multiphase refinement (all crystalline materials)
- Nanophase, and small crystallite size content
- Amorphous phase + crystalline phase(s)
Sessions are held:
- Monday through Thursday: 8:30 am to 5:30 pm
- Friday: 8:30 am to 4:00 pm
Rietveld Refinement & Indexing Clinic
4 – 8 April 2022
Register by 22 February 2022: $1,700 USD
After 22 February 2022: $1,950 USD
Have a group of 3 or more attendees? Contact Steph Jennings for pricing. To obtain the group discount, all registrations must be submitted at the same time. Registrations made before or after are not eligible for the discount.
Registration fees for training courses include lecture, workshop and lab materials as well as catered lunches on all full days. Payment must be received prior to the start of the course to attend. Online registrations will be accepted up until two weeks before the start of the course; after that time, please call for availability.
ICDD is keeping a close watch on the coronavirus situation. At the present time, all clinics are scheduled as an in-person class; this could change if warranted. All attendees are required to be fully vaccinated in order to attend the 2022 clinics.
ICDD reserves the right to use any and all photographs taken throughout the course to promote the clinics without additional approval from you, the participant.
The Best Western Plus Concordville Hotel is the host hotel for the ICDD clinics. Book your accommodations within our room block and daily round trip transportation, will be provided to ICDD. Please be sure to use the Group Code for your particular clinic – found here.
The Best Western Plus Concordville Hotel also offers a government rate, please call the hotel directly (610) 358-9400 to book your stay. Please be aware, you will need to pay an additional fee for the daily transportation.
Tuition Waiver Opportunities
ICDD offers a limited number of tuition waivers for the Rietveld Refinement & Indexing Clinic. Faculty members and graduate students are encouraged to apply. If you are currently developing a program in Rietveld Analysis, and are interested in incorporating these topics into an established course, a tuition waiver can provide you with the opportunity to learn the principles and practices from some of the experts in the field.
Want more information, or wish to apply? Click here.
Transfer, Cancellation and Refund Policy
ICDD must guarantee payment for meals and materials in advance. You will receive a 50% refund of the paid registration fee if your written cancellation is received at ICDD 20 business days prior to the start of the class. With less notice, a colleague may take your place, or the course materials will be mailed to you, but no refund will be given.
Please note: A minimum of 10 registrants per course is required, otherwise the course will be cancelled and your registration fee will be refunded. You will be notified of a course cancellation no later than two weeks prior to the start of the course.
If you have any questions, please contact Eileen Jennings, Education Coordinator at firstname.lastname@example.org
The Rietveld workshop was extremely beneficial. I have a much better understanding/knowledge of Rietveld refinement. Instead of blindly using Rietveld refinement techniques, I can now understand how, why, when, if/and it can be used. The staff is extremely knowledgeable of the material that is covered in the course. I would recommend this workshop to anybody who uses Rietveld refinement tools.
This workshop should be a course in academia (i.e. Materials Science & Engineering). It provides you a strong and solid background on X-ray diffraction. I wish I knew this workshop ten years ago; my research career would have been in much higher level. I wish the best to all faculties and staffs that are running the workshop.
The workshop was a great learning experience. You could not ask for more experienced faculty. The classroom is very comfortable. Materials are presented in a simple to complex way. Faculty gave tricks and trips not found in tutorials. This workshop is great.
Before the workshop Rietveld analysis was an untamable mystery. In the course, I learned the basics to tame that method and use it for my work.