NIST640G

Line Position And Line Shape Standard for Powder Diffraction

(Silicon powder) NIST^® SRM^® 640G

• Synonym(s): Silicone powder
• UNSPSC Code: 41116107
• NACRES: NA.24

Properties

• form: powder
• packaging: pkg of 7.5 g
• manufacturer/tradename: NIST^®
• technique(s): diffraction/scattering: suitable

Description

General description

The Standard Reference Material (SRM) was prepared from ultra-high purity, intrinsic silicon boules that were crushed and jet milled to a median particle size of 4.1μm. The resulting powder was then annealed under gettered argon at 1000 °C for two hours and bottled under argon.

SRM 640F_Cert

SRM 640F_SDS

Application

This SRM is intended for use as a standard for calibration of diffraction line positions and line shapes, determined through powder diffractometry.

Features and Benefits

• A unit of SRM 640f consists of approximately 7.5 g of silicon powder bottled under argon.
  
• Analysis of X-ray powder diffraction data indicated that the SRM material is homogeneous with respect to diffraction properties.
  
• SRM 640f was bottled under argon to protect against humidity.
  
• The certification data was analyzed using the FPA method with Pawley refinements as implemented in TOPAS.
  
• Expiration details and storage instructions are available in the NIST certificate.

Other Notes

Please download a current certificate at nist.gov/SRM for current analytes and certified values.

Legal Information

NIST is a registered trademark of National Institute of Standards and Technology

SRM is a registered trademark of National Institute of Standards and Technology

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: nwg
• flash_point_f: Not applicable
• flash_point_c: Not applicable