• 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 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 Specimen For Sale

    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.
  • (PDF) Menezesite, the first natural heteropolyniobate ...

    www.researchgate.net/.../222093272_Menezesite_the_first_natural_heteropolynio... Menezesite, the first natural heteropolyniobate, from Cajati, São Paulo, Brazil: Description and crystal structure Article (PDF Available) in American Mineralogist 93:81-87 · January 2008 with ...
  • Menezesite mineral information and data

    www.dakotamatrix.com/mineralpedia/7720/menezesite Menezesite - Named for Luiz Alberto Dias Menezes Filho, a mining engineer, mineral collector, and merchant. It occurs only at the type locality at the
  • 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
  • menezesite - Wiktionary

    en.wiktionary.org/wiki/menezesite menezesite A reddish-brown isometric mineral containing barium, hydrogen, magnesium, niobium, oxygen and zirconium; References “menezesite”, in Mindat.org‎, Hudson Institute of Mineralogy, accessed 29 August 2016.
  • Menezesite, the first natural heteropolyniobate, from ...

    rruff-2.geo.arizona.edu/uploads/AM93_81.pdf = 2. 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
  • Menezesite Mineral Data

    webmin.mindat.org/data/Menezesite.shtml Menezesite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram. Greater than 70 Bq / gram. Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 294.28 ± 73.57 grams of pure Menezesite .
  • Menezesite - RRUFF Database: Raman, X-ray, Infrared, and ...

    rruff.info/Menezesite Name: Menezesite RRUFF ID: R060979 Ideal Chemistry: Ba 3 MgZr 4 Nb 12 O 42 ·12H 2 O Locality: Jacupiranga mine, Cajati, Sao Paulo, Brazil Source: Michael Scott S100864 Owner: RRUFF Description: Rootbeer colored dodecahedra associated with calcite, phlogopite, clinohumite, pyrite and magnetite Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.