斜方晶系

WordNet

(physical chemistry) a sample of matter in which substances in different phases are in equilibrium; "in a static system oil cannot be replaced by water on a surface"; "a system generating hydrogen peroxide"
instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the system consists of a motor and a small computer"
a group of independent but interrelated elements comprising a unified whole; "a vast system of production and distribution and consumption keep the country going" (同)scheme
a complex of methods or rules governing behavior; "they have to operate under a system they oppose"; "that language has a complex system for indicating gender" (同)system of rules
a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion"
a procedure or process for obtaining an objective; "they had to devise a system that did not depend on cooperation"
the living body considered as made up of interdependent components forming a unified whole; "exercise helped him get the alcohol out of his system"

PrepTutorEJDIC

〈C〉(関連した部分から成る)『体系』,系統,組織[網],装置 / 〈C〉(教育・政治などの)『制度』,機構;《the~》体制 / 〈C〉(思想・学問などの)『体系』,学説 / 〈C〉(…の)『方法』,方式,やり方《+of doing》 / 〈U〉正しい方針(筋道,順序) / 〈U〉《the~》(身体の)組織,系統 / 〈U〉《the~,one's~》身体,全身

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/09/19 18:43:04」(JST)

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In crystallography, the orthorhombic crystal system is one of the seven lattice point groups. Orthorhombic lattices result from stretching a cubic lattice along two of its orthogonal pairs by two different factors, resulting in a rectangular prism with a rectangular base (a by b) and height (c), such that a, b, and c are distinct. All three bases intersect at 90° angles. The three lattice vectors remain mutually orthogonal.

Bravais lattices[edit source | edit]

There are four orthorhombic Bravais lattices: simple orthorhombic, body-centered orthorhombic, base-centered orthorhombic, and face-centered orthorhombic.

Orthorhombic Bravais lattices
Primitive	Body-centered	Base-centered	Face-centered

Crystal classes[edit source | edit]

The orthorhombic crystal system class names, examples, Schönflies notation, Hermann-Mauguin notation, point groups, International Tables for Crystallography space group number,^[1] orbifold notation, type, and space groups are listed in the table below.

#	Point group					Example	Type	Space groups
#	Name	Schönflies	Intl	Orbifold	Coxeter	Example	Type	Space groups
16-24	sphenoidal ^[2]	D₂	222	222	[2,2]⁺	epsomite	enantiomorphic	P222, P222₁, P2₁2₁2, P2₁2₁2₁, C222₁, C222, F222, I222, I2₁2₁2₁
25-46	pyramidal ^[2]	C_2v	mm2	*22	[2]	hemimorphite, bertrandite	polar	Pmm2, Pmc2₁, Pcc2, Pma2, Pca2₁, Pnc2, Pmn2₁, Pba2, Pna2₁, Pnn2, Cmm2, Cmc2₁, Ccc2, Amm2, Aem2, Ama2,Aea2, Fmm2, Fdd2, Imm2, Iba2, Ima2
47-74	bipyramidal ^[2]	D_2h	mmm	*222	[2,2]	olivine, aragonite, marcasite	centrosymmetric	Pmmm, Pnnn, Pccm, Pban, Pmma, Pnna, Pmna, Pcca, Pbam, Pccn, Pbcm, Pnnm, Pmmn, Pbcn, Pbca, Pnma, Cmcm, Cmca, Cmmm, Cccm, Cmme, Ccce, Fmmm, Fddd, Immm, Ibam, Ibca, Imma

References[edit source | edit]

Hurlbut, Cornelius S.; Klein, Cornelis (1985). Manual of Mineralogy (20th ed.). pp. 69 – 73. ISBN 0-471-80580-7.

^ Prince, E., ed. (2006). International Tables for Crystallography. International Union of Crystallography. doi:10.1107/97809553602060000001. ISBN 978-1-4020-4969-9.
^ ^a ^b ^c "The 32 crystal classes". Retrieved 2009-07-08.

UpToDate Contents

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English Journal

High pressure structural and vibrational properties of the spin-gap system Cu(2)PO(4)(OH).

Malavi PS, Karmakar S, Karmakar D, Mishra AK, Bhatt H, Patel NN, Sharma SM.SourceHigh Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
Journal of physics. Condensed matter : an Institute of Physics journal.J Phys Condens Matter.2013 Jan 30;25(4):045402. doi: 10.1088/0953-8984/25/4/045402. Epub 2012 Dec 20.
The structural and vibrational properties of the spin-gapped system Cu(2)PO(4)(OH) have been investigated at room temperature under high pressure up to ∼20 GPa by Raman scattering and synchrotron-based x-ray diffraction and infrared (IR) spectroscopic measurements. The orthorhombic phase (space
PMID 23258210

Cage-Forming Compounds in the Ba-Rh-Ge System: From Thermoelectrics to Superconductivity.

Falmbigl M, Kneidinger F, Chen M, Grytsiv A, Michor H, Royanian E, Bauer E, Effenberger H, Podloucky R, Rogl P.SourceInstitute of Physical Chemistry, University of Vienna , Währingerstrasse 42, A-1090 Wien, Austria.
Inorganic chemistry.Inorg Chem.2013 Jan 3. [Epub ahead of print]
Phase relations and solidification behavior in the Ge-rich part of the phase diagram have been determined in two isothermal sections at 700 and 750 °C and in a liquidus projection. A reaction scheme has been derived in the form of a Schulz-Scheil diagram. Phase equilibria are characterized by three
PMID 23286379

A(10) LaCdSb(9) (A=Ca, Yb): A Highly Complex Zintl System and the Thermoelectric Properties.

Wang J, Xia SQ, Tao XT.SourceState Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Ji'nan, Shandong, 250100 (China), Fax: (+86) 531-88362519, Fax: (+86) 531-88364864.
Chemistry, an Asian journal.Chem Asian J.2013 Jan;8(1):251-7. doi: 10.1002/asia.201200827. Epub 2012 Oct 19.
Two new Zintl compounds A(10) LaCdSb(9) (A=Ca, Yb), namely, Ca(9.81(1)) La(0.97(1)) Cd(1.23(1)) Sb(9) and Yb(9.78(1)) La(0.97(1)) Cd(1.24(1)) Sb(9) , have been designed and synthesized by applying the Zintl concept. Although both compounds are isoelectronic with their Ca(11) InSb(9) and Yb(11) In
PMID 23086727

Japanese Journal

Aqueous Phase Behavior of the Rare Monosaccharide D-Allose and X-ray Crystallographic Analysis of D-Allose Dihydrate

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Bulletin of the Chemical Society of Japan 88(3), 465-470, 2015
… The solubility and ice melting point of a binary system containing water and D-allose (D-All), the C3 epimer of D-glucose, were investigated and, for the first time, a binary phase diagram was constructed in the temperature range −2 to 70 °C. … The crystal system (orthorhombic), space group (P212121, #19), and number of sugar molecules per unit cell (Z = 4) were the same as those of D-All anhydride (stable Form I). …
NAID 130004801849

Aqueous Phase Behavior of the Rare Monosaccharide D-Allose and X-ray Crystallographic Analysis of D-Allose Dihydrate

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Bulletin of the Chemical Society of Japan advpub(0), 2015
… The solubility and ice melting point of a binary system containing water and D-allose (D-All), the C3 epimer of D-glucose, were investigated and, for the first time, the binary phase diagram was constructed in the temperature range -2 to 70 oC. … The crystal system (orthorhombic), space group (P212121, #19), and number of sugar molecules per unit cell (Z = 4) were the same as those of D-All anhydride (stable Form I). …
NAID 130004703953

Solvothermal Synthesis of Shape-Controlled Perovskite MTiO₃ (M = Ba, Sr, and Ca) Particles in H₂O/Polyols Mixed Solutions

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MATERIALS TRANSACTIONS 55(1), 147-153, 2014
… Shape control of the BaTiO3 and SrTiO3 particles was achieved by choice of glycols, and anisotropic rod-shaped fine BaTiO3 particles with a tetragonal crystal system were selectively synthesized by use of ethylene glycol. … These BaTiO3 particles had a cubic crystal system. … Meanwhile, concave cubic-shaped CaTiO3 particles with an orthorhombic phase were synthesized. …
NAID 130004825126