The first X-ray diffraction measurements on Mars oleh David Bish, David Blake, David Vaniman, Philippe Sarrazin, Thomas Bristow, Cherie Achilles, Przemyslaw Dera, Steve Chipera, Joy Crisp, R. T. Downs, Jack Farmer, Marc Gailhanou, Doug Ming, John Michael Morookian, Richard Morris, Shaunna Morrison, Elizabeth Rampe, Allan Treiman, Albert Yen