Ferraioloite from the Sítio do Castelo mine, Folgosinho (Guarda, Portugal), description and Raman spectroscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F21%3A10135295" target="_blank" >RIV/00023272:_____/21:10135295 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14310/21:00122852

Result on the web

<a href="http://www.jgeosci.org/detail/jgeosci.326/abstract/" target="_blank" >http://www.jgeosci.org/detail/jgeosci.326/abstract/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.326" target="_blank" >10.3190/jgeosci.326</a>

Result language

angličtina

Original language name

Ferraioloite from the Sítio do Castelo mine, Folgosinho (Guarda, Portugal), description and Raman spectroscopy

Original language description

A zinc phosphate corresponding to ferraioloite with low Mg and high Na cation contents in interlayer space was identified in samples from the Sítio do Castelo mine, Folgosinho (Guarda, Portugal). It occurs as sky-blue, pearly lustrous, radial or irregular aggregates up to 1 mm in size composed of very thin elongated flaky crystals. The mineral is monoclinic, space group I2/m, with unit-cell parameters refined from X-ray powder diffraction data: a = 25.417(7), b = 6.342(4), c =15.186(5) Å, β = 90.02(4)o, V = 2448.0(17) Å3. The chemical composition generally agrees with published data for ferraioloite, but differs significantly in elements present at sites assumed to be in the interlayer of the crystal structure. The corresponding empirical formula based on 8 (PO)4 and 4 (OH) groups pfu is (Mg0.16Na0.15Ca0.09K0.01)Σ0.41Mn4.22(Fe2+1.64Fe3+1.15Al1.47)Σ4.26Zn3.87(PO4)8(OH)4(H2O)20. The Raman spectra and tentative assignment of observed bands are given. The most prominent bands are attributed to stretching and bending vibrations of phosphate tetrahedra and complex metal-centered polyhedra. Bands of O-H stretching vibrations are weak, and bending vibrations of water molecules were not observed. The origin of the mineral is related to in-situ supergene weathering of zwieselite-triplite and isokite-fluorapatite assemblages with admixtures of sphalerite.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10504 - Mineralogy

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geosciences

ISSN

1802-6222

e-ISSN

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Volume of the periodical

66

Issue of the periodical within the volume

3

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

139-146

UT code for WoS article

000718259900002

EID of the result in the Scopus database

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