• Menezesite Mineral Data

    webmineral.com/data/Menezesite.shtml PE Menezesite = 252.41 barns/electron U=PE Menezesite x r electron = 968.46 barns/cc. Radioactivity: GRapi = 103,359.74 (Gamma Ray American Petroleum Institute Units) Concentration of Menezesite per GRapi unit = 9.67 (PPM) Menezesite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
  • Menezesite: Mineral information, data and localities.

    www.mindat.org/min-27607.html The first natural heteropolyniobate to be found. Both menezesite and aspedamite are the only natural heteropolyniobate known at present. Menezesite is somewhat chemically similar to hexaniobates peterandresenite and hansesmarkite.Visually similar to aspedamite and peterandresenite.
  • Menezesite - Mindat.org

    www.mindat.org/gm/27607 3.4 x 2.5 x 2.0 cm. Menezesite is a very rare hydrated Zr-Nb oxide and is unique, worldwide to this deposit. The red arrow points toward a 2 mm brown crystal. The dolomite matrix also includes other minerals, including ancylite-(Ce), a rare Sr-Ce carbonate. Excellent and rare combination material from the Matioli Collection.
  • Menezesite, the first natural heteropolyniobate, from ...

    rruff-2.geo.arizona.edu/uploads/AM93_81.pdf monic parameters of menezesite are shown in Tables 5 and 6, respectively. Selected bond lengths and angles are given in Table 7. Calculated and observed structure factors are provided in Table 81. Menezesite is isostructural with the synthetic compound . Mg 7 [MgW 12 O 42](OH) 4 ·8H 2 O studied by Günter et al. (1990)
  • Menezesite Mineral Specimen For Sale - Dakota Matrix Minerals

    www.dakotamatrix.com/products/13091/menezesite Menezesite - This looks like a small speck, it is. But under the scope you can see three well-defined crystals. I obtained this from the late Luiz Menezes himself and it is the last one I have. Luiz was a good mineralogist, and sadly he passed away a few years ago. Fortunately, his legacy is left behind by his namesake mineral, a very rare Zirconium-Niobium oxide.
  • Menezesite, the first natural heteropolyniobate, from ...

    www.minsocam.org/MSA/AmMin/TOC/Abstracts/2008_Abstracts/.../Atencio_p81_08.pdf Menezesite is isostructural with the synthetic com-pound Mg 7 [MgW 12 O 42](OH) 4 ·8H 2 O. The mineral was named in honor of Luiz Alberto Dias Menezes Filho (born 1950), mining engineer, mineral collector and merchant. Both the description and the name were approved by the CNMMN-IMA (Nomenclature Proposal 2005-023). Menezesite is the
  • Aspedamite - Wikipedia

    en.wikipedia.org/wiki/Aspedamite Its structure (isometric, space group Im3) is the same as of the second known heteropolyniobate - menezesite. Aspedamite is somewhat similar to another mineral from Norway, peterandresenite, which is a hexaniobate. References This article about a specific mineral or mineraloid is a stub. You can ...
  • Luiz Alberto Dias Menezes - Wikipedia

    en.wikipedia.org/wiki/Luiz_Alberto_Dias_Menezes Luiz Alberto Dias Menezes (5 October 1950 – 9 July 2014) was a geologist, mineralogist and mineral dealer from Brazil.He was born in São Paulo.. He collected the material that was used for the discovery of new mineral was named in his honor as menezesite.He also contributed extensively in mineralogy of Brazil, participating in the discovery of up to seven mineral species.
  • Category:Menezesite - Wikimedia Commons

    commons.wikimedia.org/wiki/Category:Menezesite This page was last edited on 21 May 2019, at 02:52. Files are available under licenses specified on their description page. All structured data from the file and property namespaces is available under the Creative Commons CC0 License; all unstructured text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply.
  • The Arkenstone - www.iRocks.com Fine Minerals from Robert ...

    www.irocks.com The New Arkenstone Gallery Our new gallery space in Dallas has over 7,000 square feet of mineral displays in our new showroom. Take a Tour. A Brand New iRocks.com Exploring your favorite minerals has never been better. Learn More. New Specimens from the Tom Hall Collection.