Kuliokite-(water(y) — wikipedia

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SUPPORTING- (Y)
Category IX  : silicates [ first ]
General
Classe de Strunz
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9.Ag.50

DANA CLASS

78.07.08.01

Chemical formula H 2 AlF 5 O ten And 2 AND 4 AND 4 Al (sio 4 ) 2 (OH) 2 F 5
Identification
Mass form [ 2 ] 695,7778 ± 0.0038 one
H 0.29%, at 3.88%, F 13.65%, or 22.99%, if 8.07%, and 51.11%
Color colorless, rose-class, white
Crystalline class and space group pedal –
P first
Crystalline system Triclini
Bravais network Primitive p
Cleavage bad on {010}
Habitus flattened
Mohs scale 4-5
Trait blanc
Glow adamantin
Optical properties
Refractive index n a = 1,656;
n b = 1,700;
n c = 1,703
Briefing biaxial(-) ; 0,0470
Dispersion 2 in With ~ 19 to 29
Transparency transparent
Chemicals
Density 4.35
Physical properties
Radioactivity 137 BQ/G
SI & CNTP units, unless otherwise indicated.
modifier Consultez la documentation du modèle

The SUPPORTING- (Y) is a mineral species of the group of silicates and the subgroup of the born, Formula Y 4 Al (sio 4 ) 2 (OH) 2 F 5 , présentant des traces de Gd, Dy, Ho, Er, Tm, Yb, Lu et H2O.

History of the description and names [ modifier | Modifier and code ]

Inventor and etymology [ modifier | Modifier and code ]

Kuliokite- (Y) was described in 1986 by Voloshin and Pakhomovskii [ 3 ] ; His name was given to him according to his typical locality: the Kuliok river in the Kola peninsula in Russia. The “(y)” comes from the presence of yttrium in its composition.

Topotype [ modifier | Modifier and code ]

  • The topotype is at the Kuliok river, Kola peninsula, Oblast of Mourmansk, in Russia [ 4 ] , [ 5 ] .
  • The reference samples are deposited at the Museum of Geology of St Petersburg, as well as at the Mineralogical Museum A. E. Fersman in Moscow, in Russia.

Determination criteria [ modifier | Modifier and code ]

Kuliokite- (y) is in the form of flattened crystals exceeding 0.5 mm . It has a bad cleavage on {010}.

Its crystals are transparent, of adamantine and birefringent radiance; Its color varies between colorless, rose-class and white. Its line is white.

It is radioactive, with a mass activity of 137 Bq/g .

Crystallography [ modifier | Modifier and code ]

Kuliokite- (y) crystallizes in the triclinical crystalline system, of space group P 1 (Z = 1 Form unit per conventional mesh) [ 6 ] .

  • Mesh parameters: a = 8.606 To , b = 8,672 To , c = 4,317 To , a = 102.79 °, b = 97.94 °, c = 116.66 ° (volume of the mesh: IN = 270.16 To 3 )
  • Calculated density = 4.28 g/cm 3

Associated gitology and minerals [ modifier | Modifier and code ]

Kuliokite- (y) is in inclusions in fluorite or in the cracks of microcline pegmatites.

It is found associated with the following minerals: Thalenite, Xenotime, Kainosite, Bastnäsite, Keiviite- (Y), Keiviite- (Yb), Quartz, Fluorite.

Producer deposits of remarkable specimens [ modifier | Modifier and code ]

Drapeau de la Norvège Norway

Drapeau de la Russie Russia

  1. ↑ The classification of the minerals chosen is that of Strunz, with the exception of the polymorphs of the silica, which are classified among the silicates.
  2. ↑ Molar mass calculated after ‘ Atomic weights of the elements 2007 » , on www.chem.qmul.ac.uk .
  3. ↑ (ru) A.V. Voloshin et al. , ‘ Kuliokite-(Y), a new yttrium-aluminium fluorine-silicate from amazonite pegmatites of the Kola Peninsula » , Mineral. Zhurn. , vol. 8, , p. 94-99
  4. ↑ a et b (in) A.V. Voloshin et ya. A. Pakhomovskii, Minerals and mineral formation evolution in amazonite pegmatites of Kola peninsula , Leningrad, Nauka, 1986, p. 168
  5. ↑ (in) I. Pekov, Minerals First discovered on the territory of the former Soviet Union , Ocean Pictures, Moscow, 1998, 369 p.
  6. ↑ (RU+EN) Sokolova et al , ‘ Crystal structure of the new Y-Al silicate kuliokite-(Y), Y 4 Al (sio 4 ) 2 (OH) 2 F 5 » , SOV. PHYS. Dokl. , vol. thirty first, n O 8, , p. 601-603
  7. ↑ (in) Advise , Sæbø , Austrheim And Kristiansen , ‘ Kuliokite-(Y) and its alteration products kaysite- (y) and kamphaugite-(Y) from granite peggmatite in tørdal, Norway » , European Journal of Mineralogy , vol. 5, , p. 691-698
  8. ↑ Collection de Tomas Husdal

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