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NIST640G

Line Position And Line Shape Standard for Powder Diffraction

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(Silicon powder) NIST® SRM® 640G

Synonym(s):

Silicone powder

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About This Item

UNSPSC Code:
41116107
NACRES:
NA.24

form

powder

packaging

pkg of 7.5 g

manufacturer/tradename

NIST®

technique(s)

diffraction/scattering: suitable

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

Storage Class Code

13 - Non Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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