Bismuth phosphates from the Sítio do Castelo mine, Folgosinho (Portugal): description and Raman spectroscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F24%3A10136572" target="_blank" >RIV/00023272:_____/24:10136572 - isvavai.cz</a>

Výsledek na webu

<a href="http://bullmineral.cz/paper/download/355/fulltext" target="_blank" >http://bullmineral.cz/paper/download/355/fulltext</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Bismuth phosphates from the Sítio do Castelo mine, Folgosinho (Portugal): description and Raman spectroscopy

Popis výsledku v původním jazyce

Two bismuth phosphates, zaïrite and monoclinic analogue of ximengite, are described from the Sítio do Castelo mine, Folgosinho (Portugal). Zaïrite is known from Folgosinho for a long time, but no analytical data have been published so far. On the studied samples, it forms bright yellow crystals of variable morphology, from tabular to columnar and spindle-shaped crystals. Electron microprobe analysis showed the relative purity of the zaïrite with a minor content of elements typical of plumbogummite group minerals. The empirical formula can be expressed as (Bi0.84Sr0.08Ca0.06Pb0.01)Σ0.99Fe3.07[(PO4)1.91(SO3)0.09]Σ2.00[(OH)6.01F0.09]Σ6.10. The Raman spectrum of zaïrite is dominated by vibrational bands of (PO4)3- and (OH)- units. Monoclinic bismuth orthophosphate, unknown as a mineral species until now, was rarely found as aggregate up to 30 μm in size rimmed by zaïrite. Its empirical formula is (Bi0.97Fe0.04Ca0.02)Σ1.02(PO4)1.00F0.09. The Raman spectrum agrees with published data for the BiPO4 polymorph of SbPO4-type, space group P21/m. The two described bismuth phosphates at the Sítio do Castelo mine were formed by the decomposition of unspecified primary bismuth minerals due to the activity of low-temperature phosphorus-rich solutions.

Název v anglickém jazyce

Bismuth phosphates from the Sítio do Castelo mine, Folgosinho (Portugal): description and Raman spectroscopy

Popis výsledku anglicky

Two bismuth phosphates, zaïrite and monoclinic analogue of ximengite, are described from the Sítio do Castelo mine, Folgosinho (Portugal). Zaïrite is known from Folgosinho for a long time, but no analytical data have been published so far. On the studied samples, it forms bright yellow crystals of variable morphology, from tabular to columnar and spindle-shaped crystals. Electron microprobe analysis showed the relative purity of the zaïrite with a minor content of elements typical of plumbogummite group minerals. The empirical formula can be expressed as (Bi0.84Sr0.08Ca0.06Pb0.01)Σ0.99Fe3.07[(PO4)1.91(SO3)0.09]Σ2.00[(OH)6.01F0.09]Σ6.10. The Raman spectrum of zaïrite is dominated by vibrational bands of (PO4)3- and (OH)- units. Monoclinic bismuth orthophosphate, unknown as a mineral species until now, was rarely found as aggregate up to 30 μm in size rimmed by zaïrite. Its empirical formula is (Bi0.97Fe0.04Ca0.02)Σ1.02(PO4)1.00F0.09. The Raman spectrum agrees with published data for the BiPO4 polymorph of SbPO4-type, space group P21/m. The two described bismuth phosphates at the Sítio do Castelo mine were formed by the decomposition of unspecified primary bismuth minerals due to the activity of low-temperature phosphorus-rich solutions.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10504 - Mineralogy

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Bulletin Mineralogie Petrologie

ISSN

2570-7337

e-ISSN

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Svazek periodika

32

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

105-113

Kód UT WoS článku

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EID výsledku v databázi Scopus

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