WordNet
- a mineral consisting of potassium magnesium double sulphate; used as a fertilizer
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/09/10 22:13:50」(JST)
[Wiki en表示]
Langbeinite |
General |
Category |
Sulfate mineral |
Formula
(repeating unit) |
K2Mg2(SO4)3 |
Strunz classification |
07.AC.10 |
Crystal symmetry |
Isometric tetartoidal
H-M symbol: (2 3)
Space group: P 213 |
Unit cell |
a = 9.92 Å; Z=4 |
Identification |
Color |
Colorless with pale shades of yellow, pink, red, green, gray |
Crystal habit |
As nodules, disseminated grains, bedded massive |
Crystal system |
Cubic |
Fracture |
Conchoidal |
Tenacity |
Brittle |
Mohs scale hardness |
3.5 - 4 |
Luster |
Vitreous |
Diaphaneity |
Transparent |
Specific gravity |
2.83 |
Optical properties |
Isotropic |
Refractive index |
n = 1.5329–1.5347 |
Solubility |
Slowly dissolves in water |
Other characteristics |
Piezoelectric |
References |
[1][2][3] |
Langbeinite is a potassium magnesium sulfate mineral with formula: K2Mg2(SO4)3. Langbeinite crystallizes in the isometric - tetartoidal system as transparent colorless or white with pale tints of yellow to green and violet crystalline masses. It has a vitreous luster. The Mohs hardness is 3.5 to 4 and the specific gravity is 2.83. The crystals are piezoelectric.[1]
The mineral is an ore of potassium and occurs in marine evaporite deposits in association with carnallite, halite and sylvite.[1]
It was first described in 1891 for an occurrence in Wilhelmshall, Halberstadt, Saxony-Anhalt, Germany, and named for A. Langbein of Leopoldshall, Germany.[1][2]
References
- ^ a b c d Handbook of Mineralogy
- ^ a b Mindat with location data
- ^ Webmineral data
English Journal
- Optical properties and energy transfer of a novel KSrSc2(PO4)3:Ce3+/Eu2+/Tb3+ phosphor for white light emitting diodes.
- Jiao M1, Lv W, Lü W, Zhao Q, Shao B, You H.
- Dalton transactions (Cambridge, England : 2003).Dalton Trans.2015 Mar 7;44(9):4080-7. doi: 10.1039/c4dt03906h.
- A new langbeinite-type phosphate KSrSc2(PO4)3 has been synthesized by conventional high temperature solid state reaction. Rietveld structure refinement, a field emission scanning electron microscope, photoluminescence spectra, quantum efficiency as well as lifetimes were used to characterize the sam
- PMID 25623365
- Crystal structure of langbeinite-related Rb0.743K0.845Co0.293Ti1.707(PO4)3.
- Strutynska NY1, Bondarenko MA1, Ogorodnyk IV1, Baumer VN2, Slobodyanik NS1.
- Acta crystallographica. Section E, Crystallographic communications.Acta Crystallogr E Crystallogr Commun.2015 Feb 7;71(Pt 3):251-3. doi: 10.1107/S2056989015001826. eCollection 2015.
- Potassium rubidium cobalt(II)/titanium(IV) tris-(orthophosphate), Rb0.743K0.845Co0.293Ti1.707(PO4)3, has been obtained using a high-temperature crystallization method. The obtained compound has a langbeinite-type structure. The three-dimensional framework is built up from mixed-occupied (Co/Ti(IV))O
- PMID 25844179
- Rietveld refinement of the langbeinite-type mixed-metal phosphate K2Ni0.5Zr1.5(PO4)3.
- Zatovsky IV1.
- Acta crystallographica. Section E, Structure reports online.Acta Crystallogr Sect E Struct Rep Online.2014 Jun 18;70(Pt 7):i41. doi: 10.1107/S1600536814013658. eCollection 2014.
- Dipotassium [nickel(II) zirconium(IV)] tris-(orthophosphate) was prepared from a self-flux in the system K2O-P2O5-NiO-K2ZrF6. The title compound belongs to the langbeinite family and is built up from two [MO6] octa-hedra [M = Ni:Zr with mixed occupancy in ratios of 0.21 (4):0.79 (4) and 0.29 (
- PMID 25161511
Japanese Journal
- Preparation and crystal structure of two types of zirconium phosphates by hydrothermal reaction
- KUMADA Nobuhiro,HINATA Jun,DONG Qiang,YONESAKI Yoshinori,TAKEI Takahiro,KINOMURA Nobukazu
- Journal of the Ceramic Society of Japan 119(1390), 412-416, 2011
- … The later compound has the cubic langbeinite-type structure in which NH4+ ions were located in the tunnel and the structural refinement by using single crystal X-ray diffraction data was performed for the first time. …
- NAID 130000784601
- Structural study of langbeinite-type (NH4)2Cd2(SO4)3 crystal in the high-temperature phase
- Moriyoshi Chikako,Magome Eisuke,Itoh Kaduyuki,モリヨシ チカコ,マゴメ エイスケ,イトウ カヅユキ,森吉 千佳子,馬込 栄輔,伊東 一幸
- Ferroelectrics 337, 85-93, 2006-08-01
- … We determined the crystal structure of the high-temperature cubic phase of the langbeinite-type (NH4)2Cd2(SO4)3. …
- NAID 120000875320
Related Links
- langbeinite / ˈlæŋ baɪˌnaɪt, ˈlɑŋ-/ Show Spelled [lang-bahy-nahyt, lahng-] Show IPA noun a mineral, K 2 Mg 2 (SO 4) 3, occurring in marine salt deposits, used as a fertilizer because of its potassium content. Origin: German Langbeinit ...
- General Langbeinite Information Chemical Formula: K2Mg2(SO4)3 Composition: Molecular Weight = 415.00 gm Potassium 18.84 % K 22.70 % K 2 O Magnesium 11.71 % Mg 19.42 % MgO Sulfur 23.18 % ...
Related Pictures