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- X_unit abstract "For the software testing tools, see xUnit.The x unit (symbol xu) is a unit of length approximately equal to 0.1 pm (10−13 m). It is used to quote the wavelength of X-rays and gamma rays.Originally defined by the Swedish physicist Manne Siegbahn (1886–1978) in 1925, the x unit could not at that time be measured directly; the definition was instead made in terms of the spacing between planes of the calcite crystals used in the measuring apparatus. One x unit was set at 1⁄3029.04 of the spacing of the (200) planes of calcite at 18 °C.In modern usage, there are two separate x units, which are defined in terms of the wavelengths of the two most commonly used X-ray lines in X-ray crystallography: the copper x unit (symbol xu(Cu Kα1)) is defined so that the wavelength of the Kα1 line of copper is exactly 1537.400 xu(Cu Kα1); the molybdenum x unit (symbol xu(Mo Kα1)) is defined so that the wavelength of the Kα1 line of molybdenum is exactly 707.831 xu(Mo Kα1).The 2006 CODATA recommended values for these units are:1 xu(Cu Kα1) = 6987100207699000000♠1.00207699(28)×10−13 m,1 xu(Mo Kα1) = 6987100209955000000♠1.00209955(53)×10−13 m.↑ ↑ ↑".
- X_unit wikiPageID "722870".
- X_unit wikiPageLength "1779".
- X_unit wikiPageOutDegree "18".
- X_unit wikiPageRevisionID "675549907".
- X_unit wikiPageWikiLink Angstrom.
- X_unit wikiPageWikiLink Calcite.
- X_unit wikiPageWikiLink Category:Customary_units_of_measurement.
- X_unit wikiPageWikiLink Category:Units_of_length.
- X_unit wikiPageWikiLink Celsius.
- X_unit wikiPageWikiLink Committee_on_Data_for_Science_and_Technology.
- X_unit wikiPageWikiLink Copper.
- X_unit wikiPageWikiLink Gamma_ray.
- X_unit wikiPageWikiLink K-alpha.
- X_unit wikiPageWikiLink Manne_Siegbahn.
- X_unit wikiPageWikiLink Miller_index.
- X_unit wikiPageWikiLink Molybdenum.
- X_unit wikiPageWikiLink Sweden.
- X_unit wikiPageWikiLink Units_of_measurement.
- X_unit wikiPageWikiLink Wavelength.
- X_unit wikiPageWikiLink X-ray.
- X_unit wikiPageWikiLink X-ray_crystallography.
- X_unit wikiPageWikiLink XUnit.
- X_unit wikiPageWikiLink Ångström.
- X_unit wikiPageWikiLinkText "X unit".
- X_unit wikiPageWikiLinkText "siegbahn".
- X_unit wikiPageWikiLinkText "x unit".
- X_unit accuracy "5".
- X_unit hasPhotoCollection X_unit.
- X_unit m "1.0021E-13".
- X_unit wikiPageUsesTemplate Template:Frac.
- X_unit wikiPageUsesTemplate Template:Reflist.
- X_unit wikiPageUsesTemplate Template:Unit_of_length.
- X_unit wikiPageUsesTemplate Template:Val.
- X_unit subject Category:Customary_units_of_measurement.
- X_unit subject Category:Units_of_length.
- X_unit hypernym Unit.
- X_unit type Organisation.
- X_unit type Unit.
- X_unit comment "For the software testing tools, see xUnit.The x unit (symbol xu) is a unit of length approximately equal to 0.1 pm (10−13 m). It is used to quote the wavelength of X-rays and gamma rays.Originally defined by the Swedish physicist Manne Siegbahn (1886–1978) in 1925, the x unit could not at that time be measured directly; the definition was instead made in terms of the spacing between planes of the calcite crystals used in the measuring apparatus.".
- X_unit label "X unit".
- X_unit sameAs X-enhed.
- X_unit sameAs X-Einheit.
- X_unit sameAs Unidad_X.
- X_unit sameAs X-ühik.
- X_unit sameAs Siegbahn.
- X_unit sameAs X線単位.
- X_unit sameAs എക്സ്_യൂണിറ്റ്.
- X_unit sameAs X-eining.
- X_unit sameAs X_(jednostka_długości).
- X_unit sameAs m.035qy8.
- X_unit sameAs Икс-единица.
- X_unit sameAs X-enhet.
- X_unit sameAs Ікс_(одиниця).
- X_unit sameAs Q1542309.
- X_unit sameAs Q1542309.
- X_unit wasDerivedFrom X_unit?oldid=675549907.
- X_unit isPrimaryTopicOf X_unit.