X-Ray Diffraction Facility
Department of Earth and Planetary Sciences

Contacts:
Paul Carpenter
Dr. Brad Jolliff

Lab Overview

Rigaku D-MAX/A Diffractometer

X-ray powder diffraction is performed on a Rigaku Geigerflex D-MAX/A Diffractometer using Cu-Ka radiation. The instrument is equipped with a vertical goniometer and a scintillation counter. Maximum power is 1.5kW operating at 50kV and 50mA; however, most work is on geologic materials using 35kV and 35mA. A variety of divergence, receiving, and scatter slits are available. In addition, the instrument has a fixed sample holder that accepts horizontal mounts with 3.8cm x 5cm dimensions.

• Search-Match of the PDF-4 powder diffraction database
• Generate XRD synthetic scans from PDF or d-I peak lists
• Cell refinement using least-squares
• 3-dimensional view of structures using PDF or Mincryst data cards

• MDI MINERAL Database
• PDF4+ Utility software
• GSAS Rietveld software

Scheduling and Fees

To schedule time for training on the instrument contact Paul Carpenter or Dr. Brad Jolliff.

New users should be aware of the lab specific safety requirements and should have participated or taken the EHS lab safety training course offered online. In order to be trained on the instrument, users must sign that they have read and understand the lab specific safety sheet. Download a copy here . When you have read it, contact Paul Carpenter or Dr. Jolliff to make arrangements for a lab tour and to sign the blue book.

Dress Code in the lab:
Long pants and closed-toed shoes are a requirement in the lab (sandals are not acceptable). You may also want to bring a jacket or sweater with you, as it gets quite cold in the lab.

Instrument status:

The XRD is UP. If you have not used the instrument with the new x-ray tube, please see Paul Carpenter for information.

New Policy

Until further notice all XRD users must use the instrument only when Paul Carpenter or Brad Jolliff is present in the lab annex. This means you may use the instrument during the time from 10am - 5pm or by arrangement with Paul or Brad. Please remember this when scheduling time on the calendar.

To schedule time:

• Use the electronic calendar to check the schedule and to sign up to use the instrument. Anyone can use this system.
• You will need to get the user ID and password by sending email to Paul Carpenter.

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Fee Schedule for use of the Rigaku DMAX-A Diffractometer

All fees are on a per hour basis.

	User	Assisted
Earth and Planetary Science Department	$20	$25
Washington University (non-EPSC)	$20	$30
Other Universities and Educational Institutions	$30	$50
Commercial Users		$75

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Location and Mailing Address

Earth and Planetary Sciences Bldg, Room 152

Official Washington University Hilltop Campus map (PDF) (note: North is NOT up). Our new building (unnamed at the moment) is building number 29 at coordinates JK6,5. The old building (Wilson Hall) was building number 105 on this map.

Department of Earth and Planetary Sciences
Campus Box 1169
1 Brookings Drive
St. Louis, MO. 63130-4899

Phone: (314) 935-5471
Fax: (314) 935-7361

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