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| {{Technical|date=July 2011}}
| | My name is Krista (40 years old) and my hobbies are Handball and Bowling.<br><br>Feel free to surf to my page :: [http://pnc.yu.ac.kr/?document_srl=702031 Cheap Hostgator Hosting] |
| [[Image:Ortoclasio.jpg|thumb|right|200px|An example of the monoclinic crystals, [[orthoclase]]]]
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| In [[crystallography]], the '''monoclinic''' [[crystal system]] is one of the 7 lattice [[point group]]s. A crystal system is described by three [[Vector (geometric)|vectors]]. In the monoclinic system, the [[crystal]] is described by vectors of unequal length, as in the [[orthorhombic]] system. They form a rectangular [[prism (geometry)|prism]] with a [[parallelogram]] as its base. Hence two pairs of vectors are perpendicular, while the third pair makes an angle other than 90°.
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| ==Bravais lattices and point/space groups==
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| Two monoclinic [[Bravais lattice]]s exist: the primitive monoclinic and the centered monoclinic lattices, with layers with a rectangular and rhombic lattice, respectively.
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| {| class=wikitable
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| |+ Monoclinic Bravais lattice
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| |-
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| !Name
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| !Primitive
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| !Base-centered
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| |-
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| ![[Pearson symbol]]
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| !mP
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| !mC
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| |-
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| ![[Unit cell]]
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| |[[image:Monoclinic.svg|100px]]
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| |[[image:Monoclinic-base-centered.svg|100px]]
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| |}
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| ==Crystal classes==
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| The ''monoclinic crystal system'' class names, examples, [[Schönflies notation]], [[Hermann-Mauguin notation]], [[crystallographic point group|point groups]], International Tables for Crystallography space group number,<ref name="ITC">{{cite book |title=International Tables for Crystallography |doi=10.1107/97809553602060000001 |isbn=978-1-4020-4969-9 |editor-first=E. |editor-last=Prince |year=2006 |publisher= International Union of Crystallography}}</ref> [[orbifold]], type, and [[space groups]] are listed in the table below.
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| {| class=wikitable
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| |- align=center
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| ! rowspan=2|#
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| ! colspan=5|Point group
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| ! rowspan=2|Type<BR>(Example)
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| !rowspan=2| Space groups
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| |-
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| !Name
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| ! [[Schoenflies notation|Schön.]]
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| ! [[Hermann-Mauguin notation|Intl]]
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| ! [[orbifold|Orb.]]
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| ! [[Coxeter notation|Cox.]]
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| |- align=center
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| !3-5
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| | Sphenoidal <ref name="x-name">{{cite web |title=The 32 crystal classes|url=http://www.cartage.org.lb/en/themes/sciences/physics/SolidStatePhysics/AtomicBonding/CrystalStructure/32Crystal/32Crystal.htm |accessdate=2009-07-08 }}</ref>
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| || C<sub>2</sub>|| <math>2\ </math>|| 22|| [2]<sup>+</sup>
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| || [[enantiomorphic]] [[Chemical polarity|polar]]<BR>([[halotrichite]])
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| |align=left| P2, P2<sub>1</sub><BR>C2
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| |- align=center
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| !6-9
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| | Domatic <ref name="x-name"/>
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| || C<sub>1h</sub> (=C<sub>1v</sub> = C<sub>s</sub>)
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| || <math>\bar{2} = m</math>|| *11|| [ ]
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| || [[Chemical polarity|polar]]<BR>([[hilgardite]])
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| |align=left| Pm, Pc<BR>Cm, Cc
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| |- align=center
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| !10-15
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| | Prismatic <ref name="x-name"/>
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| || C<sub>2h</sub>|| <math>2/m\,\!</math>|| 2*|| [2,2<sup>+</sup>]
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| || [[centrosymmetric]]<BR>([[gypsum]])
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| |align=left| P2/m, P2<sub>1</sub>/m, C2/m<BR>P2/c, P2<sub>1</sub>/c, C2/c
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| |}
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| Sphenoidal is also monoclinic hemimorphic; Domatic is also monoclinic hemihedral; Prismatic is also monoclinic normal.
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| The three monoclinic hemimorphic space groups are as follows:
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| * a prism with as cross-section [[Wallpaper group#Group p2|wallpaper group p2]]
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| * ditto with screw axes instead of axes
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| * ditto with screw axes as well as axes, parallel, in between; in this case an additional translation vector is one half of a translation vector in the base plane plus one half of a perpendicular vector between the base planes.
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| The four monoclinic hemihedral space groups include
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| * those with pure reflection at the base of the prism and halfway
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| * those with glide planes instead of pure reflection planes; the glide is one half of a translation vector in the base plane
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| * those with both in between each other; in this case an additional translation vector is this glide plus one half of a perpendicular vector between the base planes.
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| ==Specific chemical examples==
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| An example of a monoclinic crystal is elemental sulfur (which can also occur in a rhombic form).<ref>C.Michael Hogan. 2011. [http://www.eoearth.org/article/Sulfur?topic=49557 ''Sulfur''. Encyclopedia of Earth, eds. A.Jorgensen and C.J.Cleveland, National Council for Science and the environment, Washington DC]</ref>
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| ==See also==
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| *[[Crystal structure]]
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| ==References==
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| {{reflist}}
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| * Hurlbut, Cornelius S.; Klein, Cornelis, 1985, ''Manual of Mineralogy'', 20th ed., pp. 65 – 69, ISBN 0-471-80580-7
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| {{Crystal systems}}
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| {{DEFAULTSORT:Monoclinic Crystal System}}
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| [[Category:Crystallography]]
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My name is Krista (40 years old) and my hobbies are Handball and Bowling.
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