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Niobium mineral of A2B2O7 general formula
Pyrochlore (Na,Ca)2Nb2O6(OH,F) is a mineral group of the niobium end member of the pyrochlore supergroup. Pyrochlore is also a term for the crystal structure
Pyrochlore
Mineral group
Betafite is a mineral group in the pyrochlore supergroup, with the chemical formula (Ca,U)2(Ti,Nb,Ta)2O6(OH). Betafite typically occurs as a primary mineral
Betafite
Chemical element with atomic number 41 (Nb)
hypoallergenic alternative to nickel. Niobium is found in the minerals pyrochlore and columbite, as well as other minerals. Its name comes from Greek mythology:
Niobium
Magnetic material under special conditions
connection between the problem of the frustrated Ising antiferromagnet on a (pyrochlore) lattice of corner-shared tetrahedra and Pauling's water ice problem,
Spin_ice
(alias sheet silicates) and clays; pyrochlore (invalid mineral name since 2010), pyrochlore group and pyrochlore supergroup; antimony and stibnite (alias
List of minerals recognized by the International Mineralogical Association
List_of_minerals_recognized_by_the_International_Mineralogical_Association
Igneous rock
calcite rock with variable accessory amphibole, biotite, pyrite, pyrochlore and fluorite. Panda Hill Carbonatite Kresten, Peter; Troll, Valentin R
Sovite
The Panda Hill Carbonatite is an apatite and pyrochlore bearing sovite carbonatite located in the Mbeya District of Tanzania. The deposit was found in
Panda_Hill_Carbonatite
Microporous, aluminosilicate mineral group
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Zeolite
Mineral
prevailing over titanium and niobium. The microlite group belongs to a large pyrochlore supergroup that occurs in pegmatites and constitutes an ore of tantalum
Microlite
Molten rock expelled by a volcano during an eruption
silicate minerals (such as micas and olivine), apatite, magnetite, and pyrochlore. This may not reflect the original composition of the lava, which may
Lava
Isotope of thorium
contain thorium include apatite, sphene, zircon, allanite, monazite, pyrochlore, thorite, and xenotime. Source: Thorium-232 has a half-life of 14 billion
Thorium-232
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
List_of_gemstones_by_species
Chemical compound
with random occupancy. Lead antimonate, Pb2Sb2O7, Naples yellow, has the pyrochlore structure. Calcium antimonate, Ca2Sb2O7, has the weberite structure. Ferric
Antimonate
Mining company in Araxá, Brazil
specializes in the processing and technology of niobium, extracted from its pyrochlore mine near the city of Araxá, in the Brazilian state of Minas Gerais. CBMM
Companhia Brasileira de Metalurgia e Mineração
Companhia_Brasileira_de_Metalurgia_e_Mineração
Index of chemical compounds with the same name
member of the spectrum starting from bixbyite and progressing through pyrochlore. Examples of the difluorides include: The alkaline earth metals all exhibit
Difluoride
[no] [no] Hydrokenopyrochlore (pyrochlore, pyrochlore: IMA2017-005) 4.D [597] [no] [no] Hydrokenoralstonite (pyrochlore: 1871) 3.CF.05 [598] [599] [600]
List of minerals recognized by the International Mineralogical Association (H)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(H)
Highest mountain in Namibia
granites contain minerals rich in rare-earth element minerals such as pyrochlore and bastnaesite. Remnants of Cretaceous volcanic rocks are preserved in
Brandberg_Mountain
Rock or sediment with valuable metals, minerals and elements
in magmatic sulphide deposits Niobium Nb Alloys, corrosion resistance Pyrochlore (Na,Ca)2Nb2O6(OH,F) and columbite ((FeII,MnII)Nb2O6) in granitic pegmatites
Ore
Chemical compound
focus of research because the magnetic frustration that results from its pyrochlore lattice. In 2009, quasiparticles resembling magnetic monopoles were observed
Dysprosium_titanate
Niobium mine in the Democratic Republic of the Congo
Republic of the Congo. The site is one of the most economically significant pyrochlore deposits in the world. The rare niobium mineral lueshite [fr] was discovered
Lueshe_mine
Niobium mine in Eastern, Uganda
and pyrochlore as a key niobium-bearing mineral. Reported commodities include phosphate rock (P2O5), niobium (often reported as Nb2O5 in pyrochlore-bearing
Sukulu_mine
Chemical element with atomic number 50 (Sn)
strong granulation, even though its chroma is low. Recently, NTP Yellow (a pyrochlore) has been brought to market as a non-toxic replacement for lead(II) chromate
Tin
Hot semifluid material found beneath the surface of Earth
silicate minerals (such as micas and olivine), apatite, magnetite, and pyrochlore. This may not reflect the original composition of the lava, which may
Magma
Pumpellyite (group of sorosilicates) Purpurite Putnisite Pyrargyrite Pyrite Pyrochlore (mineral group) Pyrolusite Pyromorphite Pyrope Pyrophanite Pyrophyllite
List_of_minerals
Class of minerals containing oxygen
the Pyrochlore supergroup 2010 (04.DH.15 and 04.DH.20) 05 Brannerite, 05 Orthobrannerite, 05 Thorutite; 10 Kassite, 10 Lucasite-(Ce) Pyrochlore group:
Oxide_mineral
Unusable radioactive materials
geochemist at the Australian National University. The Synroc contains pyrochlore and cryptomelane type minerals. The original form of Synroc (Synroc C)
Radioactive_waste
Chemical compound
Tomasz; Winiarski, Michał J. (2023-07-27). "Superconductivity in Bismuth Pyrochlore Lattice Compounds RbBi2 and CsBi2 : The Role of Relativistic Effects"
Caesium_dibismuthide
Alloy of niobium and iron
than 80% of the worldwide niobium production. The niobium is mined from pyrochlore deposits and is subsequently transformed into the niobium pentoxide Nb2O5
Ferroniobium
Complex structures in matter physics
spin ices. A common spin ice structure is shown in Figure 6 in the cubic pyrochlore structure with one magnetic atom or ion residing on each of the four corners
Geometrical_frustration
[245] [no] [no] Oxybismutomicrolite (pyrochlore: IMA2019-047) 4.0 [246] [no] [no] Oxycalciopyrochlore (pyrochlore: IMA2010 s.p., IMA1978-052 Rd) 4.0 [247]
List of minerals recognized by the International Mineralogical Association (O)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(O)
Fluorcalciomicrolite (microlite, pyrochlore: IMA2012-036) 4.0 [481] [no] [no] Fluorcalciopyrochlore (pyrochlore, pyrochlore: IMA2013-055) 4.0 [482] [no] [no]
List of minerals recognized by the International Mineralogical Association (F)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(F)
Igneous rock
(pyrochlore), (corundum), (sodalite). Syenite and quartz-syenites: Alkaline pegmatites: albite, nepheline, pyroxene, magnetite, zircon, (pyrochlore),
Litchfieldite
Complex oxide molecules that contain five or more metal ions
Zhang, Haibin (2020-04-01). "Synthesis and structures of high-entropy pyrochlore oxides". Journal of the European Ceramic Society. 40 (4): 1639–1643. doi:10
High_entropy_oxide
Rock-forming minerals with predominantly silicate anions
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Silicate_mineral
Class of minerals containing sulfide or disulfide as the major anion
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Sulfide_mineral
List of IMA recognized minerals and groupings
Ca3Te2Zn3O12, Xieite FeCr2O4 IMA/CMNMC revised the Pyrochlore supergroup 2010. Pyrochlore supergroup Pyrochlore group (D atom is Nb) Fluorcalciopyrochlore (Ca
Classification of non-silicate minerals
Classification_of_non-silicate_minerals
Town in North Kivu in the DRC
north of Rutshuru town, exploiting one of the world's biggest reserves of pyrochlore, an ore of niobium. It is said to be the most valuable mineral resource
Rutshuru
Nesosilicate mineral
chemical or crystal with oxidized titanium such as the rare earth titanate pyrochlores series and many of the minerals with the perovskite structure. The name
Titanite
Volcano in south west Tanzania
sovite containing fluorite, biotite, amphibole, pargasite and rarely pyrochlore. Dolomitic and ankeritic veins are widespread throughout the complex as
Ngualla
in varying proportions and grades) have been recorded in the Kanyika pyrochlore mines. Clinker and gypsum have been imported to produce cement. The Kangankunde
Mining_industry_of_Malawi
Province of the Democratic Republic of the Congo
cassiterite, columbo-tantalite (coltan), wolframite (tungsten oxide), diamonds, pyrochlore, zirconium, quartz, tourmaline, platinum, and phosphate, spread across
North_Kivu
Chemical compound
Molar mass 537.588 g·mol−1 Density 6.93 g/cm3 Structure Crystal structure Pyrochlore Space group Fd3m, cF88, No. 227 Lattice constant a = 1.0099 nm Formula
Holmium_titanate
Chemical compound
hyperkagome can be viewed as a "deleted" pyrochlore-type network obtained by removing one-quarter of sites from a pyrochlore lattice. In iridates with Ir4+ (5d5)
Sodium_iridate
Chemical compound
"Direct synthesis and single crystal structure determination of cubic pyrochlore-type tungsten trioxide hemihydrate, WO3 · 0.5H2O". Materials Research
Tungstic_acid
allanite, cerite, thorite, columbite, tantalite, apatite, zircon, monazite, pyrochlore euxenite and fluorite. Rare earth deposits in Alang beach Vanadium Geological
List_of_megaprojects_in_India
and for beta-roselite see roselite. (Betafite group (A2(Ti,Nb)2O6Z), pyrochlore supergroup [390]) Betekhtinite (Y: 1955) 2.BE.05 [391] [392] [393] ((Cu
List of minerals recognized by the International Mineralogical Association (B)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(B)
All Latin and Greek roots beginning with G
(khlōrós) chloranthy, chlorine, chlorophobia, chlorophyll, chloroplast, pyrochlore chondr- cartilage Greek χόνδρος (khóndros) hypochondriasis, osteochondritis
List of Greek and Latin roots in English/A–G
List_of_Greek_and_Latin_roots_in_English/A–G
Hydrous tungsten oxide mineral
and in pegmatitic greisen veins. It has a structure based on a defect pyrochlore lattice (A2B2O6O’). It was first described for an occurrence in Elsmore
Hydrokenoelsmoreite
Minerals with a dominant fluoride, chloride, bromide, or iodide anion
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Halide_mineral
Mineral supergroup
not. This is connected to the spinel B-site sublattice, which forms a pyrochlore network of corner-sharing tetrahedra, a geometry known for strong magnetic
Spinel_group
Antimony oxide mineral
'powder', alluding to its composition and habit. It is a member of the pyrochlore super group. It was first described in 1862 for an occurrence in the Brandholz
Stibiconite
Minerals containing the carbonate ion
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Carbonate_mineral
Community in Ontario, Canada
(7 March 2020). "The Crystallinity of Apatite in Contact with Metamict Pyrochlore from the Silver Crater Mine, ON, Canada". Minerals. 10 (3): 244. Bibcode:2020Mine
Cardiff,_Ontario
State of Nigeria
fluoride, granite, iron ore, kaolin, lead / zinc, marble, molybdenite, pyrochlore, salt, tantalite / columbite, and tin / wolfram. Plateau state has been
Plateau_State
Nesosilicate mineral
zircon, monazite, gadolinite, fergusonite, uraninite, yttrialite and pyrochlore. Thorite is currently an important ore of uranium. A variety of thorite
Thorite
Ontario decommissioned mine
(7 March 2020). "The Crystallinity of Apatite in Contact with Metamict Pyrochlore from the Silver Crater Mine, ON, Canada". Minerals. 10 (3): 244. Bibcode:2020Mine
Silver_Crater_Mine
Class of chemical compounds
Sato, Taku J. (2018-10-18). "Degenerate ground state in the classical pyrochlore antiferromagnet Na 3 Mn ( CO 3 ) 2 Cl". Physical Review B. 98 (14) 144426
Carbonate_chloride
Formal constraint in quantum mechanics
Charles H.; Tanner, D. B. (2010). "Raman study of phonon modes in bismuth pyrochlores". Physical Review B. 82 (21) 214302. Bibcode:2010PhRvB..82u4302A. doi:10
Selection_rule
Chemical compound
properties, with the chemical formula of Lu2V2O7 with the same structure as pyrochlore. Lutetium vanadate can be obtained by the reaction between lutetium oxide
Lutetium_vanadate
Chemical compound
(Dy2Sn2O7) is an inorganic compound, a ceramic of the stannate family, with pyrochlore structure. Dysprosium stannate, like dysprosium titanate and holmium stannate
Dysprosium_stannate
Andrade, M. B., Christy, A. G., Gieré, R., & Kartashov, P. M. (2010). The pyrochlore supergroup of minerals: nomenclature. The Canadian Mineralogist, 48(3)
Romeite
Canadian mining company
near Chicoutimi, Quebec. This mine is North America's only source of pyrochlore, the primary niobium ore, and one of only three major producers of niobium
Iamgold
Indian chemist
and alloys. In 1982 he completed his Ph.D. in solid state chemistry on pyrochlore oxides at the Indian Institute of Technology, Madras, India, under the
Mas_Subramanian
German physicist
physics, the identification and theory of a classical spin liquid on the pyrochlore lattice (both with J. T. Chalker); the theoretical discovery of the resonating
Roderich_Moessner
Potential (not yet accepted) zero-valent-dominant mineral of the pyrochlore group
is a potential (not yet accepted) zero-valent-dominant mineral of the pyrochlore group. Its formula can be written as (Y,◻)2Nb2O2O. The name "yttropyrochlore-(Y)"
Oxyyttropyrochlore-(Y)
British chemist and Professor of Chemistry
(NMR) spectroscopy and magic angle spinning (MAS) to study rare-earth pyrochlores. Following Grey's graduate studies, she held a postdoctoral research
Clare_Grey
Chemical compound
Ekeberg at Ytterby, Sweden, and Kimoto, Finland. The minerals microlite and pyrochlore contain approximately 70% and 10% Ta, respectively. Tantalum ores often
Tantalum_pentoxide
Scheme for categorizing minerals
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Nickel–Strunz_classification
Condensed matter physicist
(2016-06-07). "Spin-orbit-driven magnetic structure and excitation in the 5d pyrochlore Cd2Os2O7". Nature Communications. 7 (1) 11651. doi:10.1038/ncomms11651
John_Peter_Hill
Sulfide minerals of a metal and a semi-metal
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Sulfosalt_mineral
Mineral which contains a borate anion group
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Borate_mineral
Mineral classification
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Dana_classification_system
Oxide mineral
P. (1 March 2004). "Magnetic properties of paramelaconite (Cu4O3): A pyrochlore lattice with S = 1/2". Physical Review B. 69 (10) 104408. Bibcode:2004PhRvB
Paramelaconite
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
List of minerals recognized by the International Mineralogical Association (Y–Z)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(Y–Z)
Zirconium oxide mineral
ilmenite, zirkelite, apatite, magnetite, perovskite, fluorite, nepheline, pyrochlore and allanite. Because of their refractory nature and stability under diverse
Baddeleyite
Ceramic metal compound
structure below 1,000 °C (1,270 K; 1,830 °F), above which it transitions to a pyrochlore phase; an amorphous phase also exists below 800 °C (1,070 K; 1,470 °F)
Lanthanum_hafnate
British scientist (born 1961)
T.; Godfrey, K. (1997). "Geometrical Frustration in the Ferromagnetic Pyrochlore Ho2Ti2O7" (PDF). Physical Review Letters. 79 (13): 2554–2557. Bibcode:1997PhRvL
Steven_T._Bramwell
Simplified model in condensed matter physics
transition from conductor to insulator in systems such as rare-earth pyrochlores as the atomic number of the rare-earth metal increases, because the lattice
Hubbard_model
British materials scientist
Clare Philomena (1990). A 119Sn and 89Y MAS NMR study of rare-Earth pyrochlores. bodleian.ox.ac.uk (DPhil thesis). University of Oxford. OCLC 53567496
Anthony_Cheetham
Nickel–Strunz 9 ed mineral class number 8 (isolated tetrahedral units, mainly)
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Phosphate_mineral
Protein Proton Pumice Pumicite Purine Putrescine Pyridine Pyrimidine Pyrite Pyrochlore Pyroluria Pyroxene Pyrrole Quantitative analysis Quantum chemistry Quartz
Index_of_chemistry_articles
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
List of minerals recognized by the International Mineralogical Association (J)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(J)
Concept in quantum physics
Semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates". Phys. Rev. B. 83 (20) 205101. arXiv:1007.0016. Bibcode:2011PhRvB
Weyl_semimetal
1830) 9.FA.30 [813] [814] [815] (microlite group (tantalum dominant), pyrochlore supergroup [816]) Microsommite (cancrinite: 1872) 9.FB.05 [817] [818]
List of minerals recognized by the International Mineralogical Association (M)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(M)
allanite, cerite, thorite, columbite, tantalite, apatite, zircon, monazite, pyrochlore euxenite and fluorite. Rare earth deposits in Alang beach Vanadium Geological
Mining_in_India
Silicate mineral
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Tranquillityite
Accessory minerals of the glimmerites include ilmenite, magnetite, and pyrochlore. The carbonate-glimmerites are lighter coloured rocks compared to the
Siilinjärvi_carbonatite
30 [883] [884] [885] (Cu(Ag,Cu)3Pb19(Sb,As)22(As)2S56) StetefeldtiteQ (pyrochlore: IMA2013 s.p., IMA2010 s.p., 1867) 4.DH.20 [886] [887] [888] Note: probably
List of minerals recognized by the International Mineralogical Association (S)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(S)
[1,009] (IUPAC: lead manganese(II) hydro vanadate) (Pyrochlore group (A2Nb2(O,OH)6Z), pyrochlore supergroup [1,010]) Pyrochroite (brucite: 1864) 4.FE
List of minerals recognized by the International Mineralogical Association (P–Q)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(P–Q)
Fifth row of the periodic table
is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. The name
Period_5_element
Group of elements in the periodic table
parts per billion of niobium. Niobium is in the minerals columbite and pyrochlore. There are 2 parts per million of tantalum in the Earth's crust, making
Group_5_element
change the Synroc phase composition to primarily zirconolite-based or a pyrochlore-based ceramic. The starting precursor for Synroc-C fabrication contains
Synroc
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
List of minerals recognized by the International Mineralogical Association (W–X)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(W–X)
therefore explain the observation of CMR in stoichiometric phases like the pyrochlore Tl 2Mn 2O 7. Microstructural effects in polycrystalline samples have also
Colossal_magnetoresistance
Belgian geologist
at Lueshe mine; furthermore, he discovered Microlite, Rankamaite, and Pyrochlore, also known as Safiannikoffite. Safiannikoff worked and lived more than
Alexandre_Safiannikoff
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
List of minerals recognized by the International Mineralogical Association (U–V)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(U–V)
Class of chemical compounds
ATe4+0.5Te6+1.5-xM6+xO6 (A=Rb, Cs, M6+=Mo, W) solid solutions with β-pyrochlore structure". Journal of Solid State Chemistry. 293 121787. Bibcode:2021JSSCh
Tellurite_tellurate
(IMA2008-012) 2.0 [138] [139] [no] (Pb20Cd2(As,Bi)22S50Cl10) Tazzoliite (pyrochlore: IMA2011-018) 8.0 [140] [no] [no] Teallite (Y: 1904) 2.CD.05 [141] [142]
List of minerals recognized by the International Mineralogical Association (T)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(T)
Elements that occur in nature as minerals in uncombined form
(IDs 2.K) Other sulfosalts (IDs 2.H–J and 2.L–M) Oxides (IDs 4.A–E, e.g. pyrochlore supergroup and corundum group) Hydroxides (IDs 4.F–G) Arsenates(IV), sulfates(IV)
Native_element_mineral
American mineralogist and nuclear safety expert
; Weber, William J.; Lian, Jie (June 2004). "Nuclear waste disposal — Pyrochlore (A2B2O7): A nuclear waste form for the immobilization of plutonium and
Rodney_C._Ewing
PYROCHLORE
PYROCHLORE
PYROCHLORE
PYROCHLORE
Girl/Female
Arabic
Blessing of Allah
Girl/Female
Tamil
Morning, Goddess of sound
Female
Irish
Irish Gaelic name CÉIBHFHIONN means "fair locks." In mythology, this is the name of a water goddess of inspiration, intelligence, knowledge and creativity.
Boy/Male
Indian, Kannada, Tamil
King of Music
Girl/Female
African, Arabic
Handsome; Chaste Woman
Female
Swedish
Swedish form of Old Norse Þorbjorg, TORBJÖRG means "Thor's protection."
Boy/Male
Gaelic Scottish
Hero.
Girl/Female
Hebrew
Devoted to God.
Boy/Male
Muslim
Brave. Bold.
Girl/Female
English American Hebrew Spanish
From the valley.
PYROCHLORE
PYROCHLORE
PYROCHLORE
PYROCHLORE
PYROCHLORE
n.
A metallic element found in certain rare minerals, as thorite, pyrochlore, monazite, etc., and isolated as an infusible gray metallic powder which burns in the air and forms thoria; -- formerly called also thorinum. Symbol Th. Atomic weight 232.0.
n.
A niobate of calcium, cerium, and other bases, occurring usually in octahedrons of a yellowish or brownish color and resinous luster; -- so called from its becoming grass-green on being subjected to heat under the blowpipe.