X-ray Diffraction - Revision history

Cmditradmin at 21:31, 7 January 2019

2019-01-07T21:31:35Z

← Older revision		Revision as of 14:31, 7 January 2019
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	=== External Links ===		=== External Links ===
	*[[wikipedia:X-ray crystallography]]		*[[wikipedia:X-ray crystallography]]

	*[http://www.eserc.stonybrook.edu/ProjectJava/Bragg/ Applet demonstrates Braggs Law]

	*[http://www.tulane.edu/~sanelson/eens211/x-ray.htm Tulane U x-ray diffraction explanation]		*[http://www.tulane.edu/~sanelson/eens211/x-ray.htm Tulane U x-ray diffraction explanation]

Cmditradmin: /* Operation */

2011-10-05T16:46:22Z

Operation

← Older revision		Revision as of 09:46, 5 October 2011
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	{{#ev:youtube\|lwV5WCBh9a0}}		{{#ev:youtube\|lwV5WCBh9a0}}

			Preparing a plate for identification of lead using XRD
			{{#ev:youtube\|C7OXvDsPGjM}}

	X-diffractometer for thin films.		X-diffractometer for thin films.

Cmditradmin: /* Operation */

2011-05-24T17:56:24Z

Operation

← Older revision		Revision as of 10:56, 24 May 2011
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	X-diffractometer for powder samples		X-diffractometer for powder samples

	{{#ev:youtube\|~~jq617i86reA~~}}		{{#ev:youtube\|lwV5WCBh9a0}}

Cmditradmin: /* Operation */

2011-04-18T17:25:31Z

Operation

← Older revision		Revision as of 10:25, 18 April 2011
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	=== Operation ===		=== Operation ===
			X-diffractometer for powder samples

			{{#ev:youtube\|jq617i86reA}}

	~~UW Video in production~~

	X-diffractometer for thin films.		X-diffractometer for thin films.

Cmditradmin: /* Significance */

2011-03-15T18:48:05Z

Significance

← Older revision		Revision as of 11:48, 15 March 2011
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	[[Image:Bragg diffraction.png\|thumb\|300px\|left\| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]		[[Image:Bragg diffraction.png\|thumb\|300px\|left\| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]
	[[Image:2theta.png\|thumb\|300px\|center\|The XRD measures the diffraction angle 2 Theta with respect to the x-ray beam ]]		[[Image:2theta.png\|thumb\|300px\|center\|The XRD measures the diffraction angle 2 Theta with respect to the x-ray beam ]]
	[[Image:Trig.png\|thumb\|~~300px~~\|right\|Trigonometric solution to Bragg Equation ]]		[[Image:Trig.png\|thumb\|200px\|right\|Trigonometric solution to Bragg Equation ]]
	<br clear='all'>		<br clear='all'>
	:<math>sin \theta = \frac {\frac {1} {2d}} \frac {1} {\lambda} = \frac {\lambda} {2d }\,\!</math>		:<math>sin \theta = \frac {\frac {1} {2d}} \frac {1} {\lambda} = \frac {\lambda} {2d }\,\!</math>

Cmditradmin: /* Significance */

2011-03-15T18:47:35Z

Significance

← Older revision		Revision as of 11:47, 15 March 2011
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	[[Image:Bragg diffraction.png\|thumb\|300px\|left\| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]		[[Image:Bragg diffraction.png\|thumb\|300px\|left\| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]
			[[Image:2theta.png\|thumb\|300px\|center\|The XRD measures the diffraction angle 2 Theta with respect to the x-ray beam ]]
	[[Image:Trig.png\|thumb\|300px\|right\|Trigonometric solution to Bragg Equation ]]		[[Image:Trig.png\|thumb\|300px\|right\|Trigonometric solution to Bragg Equation ]]
	<br clear='all'>		<br clear='all'>

Cmditradmin: /* Significance */

2011-03-15T18:42:29Z

Significance

← Older revision		Revision as of 11:42, 15 March 2011
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	X-ray diffraction is caused by constructive interference of x-ray waves that reflect off internal crystal planes. A thin film or layer of powder is fixed in the path of monochromatic x-rays. A detector measures x-rays from the sample over a range of angles. The powder consists of tiny crystals randomly oriented. At certain angles of the sensor populations of crystals have the correct angle so that Bragg's equation is satisfied for one of the crystal planes, resulting in a spike in X-rays. The output graph is x-ray intensity over 2 theta, the angle of the detector.		X-ray diffraction is caused by constructive interference of x-ray waves that reflect off internal crystal planes. A thin film or layer of powder is fixed in the path of monochromatic x-rays. A detector measures x-rays from the sample over a range of angles. The powder consists of tiny crystals randomly oriented. At certain angles of the sensor populations of crystals have the correct angle so that Bragg's equation is satisfied for one of the crystal planes, resulting in a spike in X-rays. The output graph is x-ray intensity over 2 theta, the angle of the detector.

			[[Image:Bragg diffraction.png\|thumb\|300px\|left\| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]

	[[Image:Bragg diffraction.png\|thumb\|300px\| \| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]
	[[Image:Trig.png\|thumb\|300px\|right\|Trigonometric solution to Bragg Equation ]]		[[Image:Trig.png\|thumb\|300px\|right\|Trigonometric solution to Bragg Equation ]]
	<br clear='all'>		<br clear='all'>

Cmditradmin: /* Significance */

2011-03-15T18:41:59Z

Significance

← Older revision		Revision as of 11:41, 15 March 2011
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	[[Image:Bragg diffraction.png\|thumb\|300px\| \| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]		[[Image:Bragg diffraction.png\|thumb\|300px\| \| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]
			[[Image:Trig.png\|thumb\|300px\|right\|Trigonometric solution to Bragg Equation ]]
			<br clear='all'>
	:<math>sin \theta = \frac {\frac {1} {2d}} \frac {1} {\lambda} = \frac {\lambda} {2d }\,\!</math>		:<math>sin \theta = \frac {\frac {1} {2d}} \frac {1} {\lambda} = \frac {\lambda} {2d }\,\!</math>

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	:<math>d= \frac {\lambda} {2dsin\theta}\,\!</math>		:<math>d= \frac {\lambda} {2dsin\theta}\,\!</math>

	~~[[Image:Trig.png\|thumb\|300px\|Trigonometric solution to Bragg Equation ]]~~
	<div id="Flash">X-ray diffraction interactive animation</div> <swf width="500" height="400">images/4/46/Xrd.swf</swf>		<div id="Flash">X-ray diffraction interactive animation</div> <swf width="500" height="400">images/4/46/Xrd.swf</swf>

Cmditradmin: /* Significance */

2011-03-15T18:39:19Z

Significance

← Older revision		Revision as of 11:39, 15 March 2011
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	=== Significance ===		=== Significance ===
	X-ray diffraction is caused by constructive interference of x-ray waves that reflect off internal crystal planes. A thin film or layer of powder is fixed in the path of monochromatic x-rays. A detector measures x-rays from the sample over a range of angles. The powder consists of tiny crystals randomly oriented. At certain angles of the sensor populations of crystals have the correct angle so that Bragg's equation is satisfied for one of the crystal planes, resulting in a spike in X-rays. The output graph is x-ray intensity over 2 theta, the angle of the detector.		X-ray diffraction is caused by constructive interference of x-ray waves that reflect off internal crystal planes. A thin film or layer of powder is fixed in the path of monochromatic x-rays. A detector measures x-rays from the sample over a range of angles. The powder consists of tiny crystals randomly oriented. At certain angles of the sensor populations of crystals have the correct angle so that Bragg's equation is satisfied for one of the crystal planes, resulting in a spike in X-rays. The output graph is x-ray intensity over 2 theta, the angle of the detector.



	[[Image:Bragg diffraction.png\|thumb\|300px\| \| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]		[[Image:Bragg diffraction.png\|thumb\|300px\| \| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]

			:<math>sin \theta = \frac {\frac {1} {2d}} \frac {1} {\lambda} = \frac {\lambda} {2d }\,\!</math>

			:<math>\lambda = 2d sin \theta\,\!</math>

			:<math>d= \frac {\lambda} {2dsin\theta}\,\!</math>

			[[Image:Trig.png\|thumb\|300px\|Trigonometric solution to Bragg Equation ]]
	<div id="Flash">X-ray diffraction interactive animation</div> <swf width="500" height="400">images/4/46/Xrd.swf</swf>		<div id="Flash">X-ray diffraction interactive animation</div> <swf width="500" height="400">images/4/46/Xrd.swf</swf>

Cmditradmin: /* Significance */

2011-02-25T00:30:22Z

Significance

← Older revision		Revision as of 17:30, 24 February 2011
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	X-ray diffraction (XRD) is a tool for characterizing arrangement of atoms in crystals and distances between crystal faces. This can be used to identify atoms and the crystalline form.		X-ray diffraction (XRD) is a tool for characterizing arrangement of atoms in crystals and distances between crystal faces. This can be used to identify atoms and the crystalline form.
	=== Significance ===		=== Significance ===
	A thin film or layer of powder is fixed in the path of x-rays ~~of a single wavelength~~. ~~Opposite a sensor~~ measures ~~diffraction~~ from the sample at a ~~series~~ of angles. The powder consists of tiny crystals randomly oriented. At certain angles on the sensor populations of crystals ~~will be found at~~ the correct angle so that ~~Braggs Law~~ is ~~obeyed~~, resulting in a spike in X-rays. The output graph is x-ray intensity over 2 theta, the angle of the detector.		X-ray diffraction is caused by constructive interference of x-ray waves that reflect off internal crystal planes. A thin film or layer of powder is fixed in the path of monochromatic x-rays. A detector measures x-rays from the sample over a range of angles. The powder consists of tiny crystals randomly oriented. At certain angles of the sensor populations of crystals have the correct angle so that Bragg's equation is satisfied for one of the crystal planes, resulting in a spike in X-rays. The output graph is x-ray intensity over 2 theta, the angle of the detector.
	[[Image:Bragg diffraction.png\|thumb\|300px\| \| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]		[[Image:Bragg diffraction.png\|thumb\|300px\| \| Reflection (constructive interference) happens only where the wave path-length difference 2d sin θ equals an integer multiple of the wavelength λ. ]]