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A free-of-charge demo version with a few thousand datasets can be downloaded. More...

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A quickstart manual is also available in Spanish. More...
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Pearson's Crystal Data
Crystal Structure Database for Inorganic Compounds

Pearson's Crystal Data is a crystallographic database published by ASM International (Materials Park, Ohio, USA), edited by Pierre Villars and Karin Cenzual. It has its roots in the well-known PAULING FILE project and contains crystal structures of a large variety of inorganic materials and compounds. The "PCD" (as it is typically abbreviated) is a collaboration between ASM International and Material Phases Data System, Vitznau, Switzerland (MPDS), aiming to create and maintain the world's largest critically evaluated "Non-organic database".

Click to enlarge (1146 x 781)

The current release 2023/24 contains about 395,000 structural data sets (including atom coordinates and displacement parameters, when determined) for about 180,000 different chemical formulas, roughly 21,700 experimental powder diffraction patterns and about 375,000 calculated patterns (interplanar spacings, intensities, Miller indices). In addition over 62,000 figure descriptions for such as cell parameters as a function of temperature, pressure or concentration are given. To reach this result, scientific editors have critically analyzed and processed over 128,000 original publications.

The database comes with an innovative retrieval software for Windows PCs developed by Crystal Impact. It offers a large variety of new elaborate new features which make retrieval of the desired information extremely easy and comfortable.

Future of Pearson's Crystal Data

The publisher of Pearson's Crystal Data (ASM International) has decided that next year's release 2024/25 will be the last offline version. Starting 2025, the data will be available as an online version through ASM International, as the crystal structure part of the "ASM Materials Platform for Data Science".

Pearson's CD News

May 28, 2024
A software update is available for release 2023/24 of Pearson's Crystal Data resolving some bugs in the entry report. More...

November 14, 2023
The new Release 2023/24 of Pearson's Crystal Data has just become available, with a total entry count of about 395,000.

July 1, 2023
Crystal Impact has decided to stop reselling Pearson's Crystal Data, because we want to focus on the development of our own software packages.

August 25, 2022
The new Release 2022/23 of Pearson's Crystal Data has become available today, with a total entry count of about 380,000. More... 

September 17, 2021
Release 2021/22 of Pearson's Crystal Data has just become available, with a total entry count of about 365,000. More... 

October 15, 2020
The new Release 2020/21 of Pearson's Crystal Data has just become available, with a total entry count of about 350,000. More... 

September 30, 2010
Release 2019/20 of Pearson's Crystal Data has just become available, with a total entry count of about 335,000. More... 

July 31, 2019
Another software update is available for both release 2017/18 and release 2018/19 of Pearson's Crystal Data. More... 

April 1, 2019
Another software update is available for both release 2017/18 and release 2018/19 of Pearson's Crystal Data. More... 

February 7, 2019
A software update is available for both release 2017/18 and release 2018/19 of Pearson's Crystal Data. More... 

October 5, 2018
Release 2018/19 of Pearson's Crystal Data has just become available, with a total entry count of about 319,000. More... 

December 12, 2017
A software update is available for release 2017/18 of Pearson's Crystal Data with a new version of "Structure Tidy" (for structure standardization and cell reduction). More... 

September 28, 2017
Release 2017/18 of Pearson's Crystal Data has just become available, with a total entry count of about 304,000. More... 

September 13, 2016
Today, release 2016/17 of Pearson's Crystal Data has become available, with two new plotting functions and a total entry count of almost 288,850. More... 

September 14, 2015
Release 2015/16 of Pearson's Crystal Data has become available with a total entry count of about 274,000. More... 

Aug 25, 2014
The new release 2014/15 of Pearson's Crystal Data contains nearly 258,500 entries. More...

Aug 27, 2013
A new release 2013/14 of Pearson's Crystal Data has just become available, with a total entry count of more than 242,600. More...

Aug 6, 2012
Release 2012/13 of Pearson's Crystal Data has just become available with a total entry count of more than 227,000. More...

Jun 11, 2012
A software update is available for release 2011/12 of Pearson's Crystal Data fixing some bugs. More... 

Dec 5, 2011
A software update is available for release 2011/12 of Pearson's Crystal Data fixing two bugs. More... 

Jul 22, 2011
Release 2011/12 of Pearson's Crystal Data has just become available with a total entry count of 212,500. More...

Aug 9, 2010
Release 2010/11 of Pearson's Crystal Data has just become available with a total entry count of 197,000. More...

Jun 30, 2010
A software update is available for all releases of Pearson's Crystal Data. (The cross-reference link to ASM Alloy Phase Diagrams Center changed.) Customers should download it from here... 

May 31, 2010
A software update (with some bug fixes) is available for all releases of Pearson's Crystal Data. Customers should download it from here... 

Nov 27, 2009
A software update is available for all releases of Pearson's Crystal Data. (Problems on systems that do not use ANSI as default character set.) Customers should download it from here... 

Sep 29, 2009
A software update is available for all releases of Pearson's Crystal Data. (The cross-reference link to Landolt-Boernstein changed.) Customers should download it from here... 

July 1, 2009
Release 2009/10 of Pearson's Crystal Data has just become available with 15,000 new entries. More...

Dec 15, 2008
A Spanish version of the Pearson's Crystal Data quickstart manual has become available thanks to the efforts of Prof. Santiago Rodr�guez Almenar. More...

Oct 31, 2008
New low-price licence types are available for Pearson's Crystal Data, starting at 360 Euros. More...

News archive...