Lueshite R090025

Name: Lueshite
RRUFF ID: R090025
Ideal Chemistry: NaNbO3
Locality: Lueshe carbonatite, Kivu Province, Democratic Republic of the Congo
Source: Karl Russ [view label]
Owner: RRUFF
Description: Black cubes
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Perovskite (38) ]
RRUFF ID: R090025.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Na0.87Ca0.03Ce0.01La0.01Th0.01)(Nb0.94Ta0.06)O3; = bright. (Na0.91Ca0.03Ce0.01La0.01)(Nb0.95Ta0.05)O3 = dark
Microprobe Data File: [ Download Excel File ]
Sample Description: Unoriented sample.

  To download sample data,
  please select a specific
  orientation angle.

Direction of polarization of laser relative to fiducial mark:
X Min:    X Max:    X Sort:
RRUFF ID: R090025
Sample Description: Unoriented sample.
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
RRUFF ID: R090025.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 7.797(1)Å    b: 7.797(1)Å    c: 7.797(1)Å
alpha: 90.007(1)°    beta: 90.007(1)°    gamma: 90.007(1)°   Volume: 474.1(2)Å3    Crystal System: rhombohedral
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

X Min:    X Max:    X Sort:
REFERENCES for Lueshite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Vousden P (1951) The structure of ferroelectric sodium niobate at room temperature, Acta Crystallographica, 4, 545-551

Wood E A (1951) Polymorphism in potassium niobate, sodium niobate, and other ABO3 compounds, Acta Crystallographica, 4, 353-362

Safiannikoff A (1959) Un nouveau minéral de niobium, Académie Royal des Sciences d’Outre-Mer, Bulletin des Séances, 5, 1251-1255

Fleischer M (1961) New mineral names, American Mineralogist, 46, 1004-1004   [view file]

Solov'ev S P, Venevtsev Y N, Zhdanov G S (1961) An X-ray study of phase transitions in NaNbO3, Soviet Physics - Crystallography, 6, 171-175   [view file]

International Mineralogical Association (1962) International Mineralogical Association: Commission on new minerals and mineral names, Mineralogical Magazine, 33, 260-263   [view file]

Sakowski-Cowley A C, Lukaszewicz K, Megaw H D (1969) The structure of sodium niobate at room temperature, and the problem of reliability in pseudosymmetric structures, Acta Crystallographica, B25, 851-865

Hewat A W (1974) Neutron powder profile refinement of ferroelectric and antiferroelectric crystal structures: sodium niobate at 22ºC, Ferroelectrics, 7, 83-85   [view file]

Seidel P, Hoffmann W (1976) Verfeinerung der kristallstruktur von NaNbO3. N. Bestimmung der absoluten konfiguration und des zwillingsgesetzes, Zeitschrift für Kristallographie, 143, 444-459   [view file]

von der Mühll R, Sadel A, Hagenmuller P (1984) Structure cristalline à 295 K de la phase ferroelectrique Li0.02Na0.98NbO3, Journal of Solid State Chemistry, 51, 176-182

Xu H, Su Y, Balmer M L, Navrotsky A (2003) A new series of oxygen-deficient perovskites in the NaTixNb1-xO3-.05x system: synthesis, crystal chemistry, and energetics, Chemistry of Materials, 15, 1872-1878

Chizhova E A, Klyndyuk A I, Bashkirov L A, Petrov G S, Makhnach L V (2004) Structural features and dielectric properties of sodium niobate in niobate La, Nd, Neorganicheskie Materialy, 40, 1508-1514

Mishchuk D O, V'yunov O I, Ovchar O V, Belous A G (2004) Structural and dielectric properties of solid solutions of sodium niobate in lanthanum and neodymium niobates, Inorganic Materials, 40, 1324-1330

Johnston K E, Tang C C, Parker J E, Knight K S, Lightfoot P, Ashbrook S E (2010) The polar phase of NaNbO3: a combined study by powder diffraction, solid-state NMR and first-principles calculations, Journal of the American Chemical Society, 132, 8732-8746

Johnston K E, Griffin J M, Walton R I, Dawson D M, Lightfoot P, Ashbrook S E (2011) 93Nb NMR and DFT investigation of the polymorphs of NaNbO3, Physical Chemistry Chemical Physics, 13, 7565-7576

Mitchell R H, Welch M D, Chakhmouradian A R (2017) Nomenclature of the perovskite supergroup: A hierarchical system of classification based on crystal structure and composition, Mineralogical Magazine, 81, 411-461   [view file]