• Tveitite-(Y) Mineral Data

    webmineral.com/data/Tveitite-(Y).shtml Tveitite-(Y) Crystallography: Axial Ratios: a:b:c =1.0079:1:1.4189 : Cell Dimensions: a = 3.924, b = 3.893, c = 5.524, Z = 2; beta = 90.27° V = 84.38 Den(Calc)= 3.87
  • Tveitite-(Y) - Mindat.org

    www.mindat.org/gm/4066 2.5x2 cm monograin fragment of pinksh tveitite-(Y) from pegmatite of alkaline granites. Microprobe and PXRD confirmed. Mineral has distinct yellow SW UV fluorescention. Collected by Igor V. Pekov in 2006 on Rovgora Mt. This material described in the article Pekov I.V. e.a. (2008): Tveitite-(Y) and rare-earth enriched fluorite from amazonite ...
  • Tveitite-(Y) Mineral Specimen For Sale

    www.dakotamatrix.com/products/12478/tveitite-y Tveitite-(Y) - Tveitite-(Y) is shown at the red arrow and it is a white to yellowish white to pinkish, nondescript mineral. It is identified by Dr. Igor Pekov. Comes with a small vial with a few grams of powdered yttrium oxide. . This and many more mineral specimens are available for sale at Dakota Matrix Minerals.
  • Tveitite-(Y) - RRUFF Database: Raman, X-ray, Infrared, and ...

    rruff.info/Tveitite-(Y) REFERENCES for Tveitite-(Y) 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.
  • Tveitite-(Y) Mineral Data

    webmin.mindat.org/data/Tveitite-(Y).shtml Tveitite-(Y) Ca1-xYxF2+x, x~0.3 Dana No: Strunz No: 03.AB.30 Locality: Notes: Dakota Matrix Excalibur Minerals Exceptional Minerals Hudson Insitute John Betts Fine Minerals
  • Tveitite-(Y) Ca Y F - handbookofmineralogy.org

    www.handbookofmineralogy.org/pdfs/tveitite-(Y).pdf Tveitite-(Y) Ca14Y5F43 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Hexagonal. Point Group: 3. Crystalline, massive. Twinning: Complex, polysynthetic, forming a three-dimensional grating of spindles, each of which is twinned internally
  • Tveitite-(Y) Mineral Specimen For Sale

    www.dakotamatrix.com/products/7890/tveitite-y Tveitite-(Y) - Crystalline mass of all Tveitite-(Y) with a soft orange yellow fluorescence. Identified and descibed by Dr. Igor Pekov. . This and many more mineral specimens are available for sale at Dakota Matrix Minerals.
  • Tveitite, a new calcium yttrium fluoride - ScienceDirect

    www.sciencedirect.com/science/article/pii/0024493777900330 Tveitite is a new mineral with formula of the type Ca 1−x (Y, RE) x F 2+x where x is approximately 0.3. It is found in a cleavelandite pegmatite at Høydalen in Tørdal, Telemark, S. Norway. The sub-cell is thought to be monoclinic, a ′=3.924, b ′=3.893, c ′=5.525, ß=90°26′, Z =2.The structure is very similar to that of fluorite and can be described in terms of a pseudo-cubic cell ...
  • Tveitite-(Y) and REE-enriched fluorite from amazonite ...

    link.springer.com/article/10.1134/S1075701509070083 Tveitite-(Y) as pods up to 10 cm across has been found at Mt. Rovgora, the Western Keivy, Kola Peninsula, Russia, in an albite-quartz-amazonite pegmatite vein related to alkaline granite. Tveitite-(Y) grains (up to 4 cm) are parallel microintergrowths of two isostructural varieties, Ca9.5Na1.7Y5.2Ln2.0F42.6 and Ca11.4Na1.9Y4.4Ln1.4F42.0. The idealized structural formula (Z = 3) is (Y, Na)6(Ca ...
  • Tveitite-(Y)

    e-rocks.com/item/ufo770291/tveitite-y Rovgora Mountain, Western Keivy Massif, Keivy Mountains, Murmansk Oblast, Russian Federation - Pale yellow massive Tveitite-(Y) on matrix