J 2018

Fluorarrojadite-(BaNa), BaNa4CaFe13Al(PO4)(11)(PO3OH)F-2, a new member of the arrojadite group from Gemerska Poloma, Slovakia

STEVKO, M., J. SEJKORA, P. UHER, F. CAMARA, Radek ŠKODA et. al.

Základní údaje

Originální název

Fluorarrojadite-(BaNa), BaNa4CaFe13Al(PO4)(11)(PO3OH)F-2, a new member of the arrojadite group from Gemerska Poloma, Slovakia

Autoři

STEVKO, M. (703 Slovensko), J. SEJKORA (203 Česká republika), P. UHER (703 Slovensko), F. CAMARA (380 Itálie), Radek ŠKODA (203 Česká republika, garant, domácí) a Tomáš VACULOVIČ (203 Česká republika, domácí)

Vydání

Mineralogical Magazine, Middlesex, Mineralogical Society, 2018, 0026-461X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10504 Mineralogy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Impakt faktor

Impact factor: 2.210

Kód RIV

RIV/00216224:14310/18:00106689

Organizační jednotka

Přírodovědecká fakulta

DOI

UT WoS

000452015500006

Klíčová slova anglicky

fluorarrojadite-(BaNa); new mineral; arrojadite group; phosphates; Raman spectroscopy; S-type granite; Gemerska Poloma; Slovakia

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 23. 4. 2024 14:40, Mgr. Michal Petr

Anotace

V originále

The new mineral fluorarrojadite-(BaNa), ideally BaNa4CaFe13Al(PO4)(11)(PO3OH)F-2 was found on the dump of Elisabeth adit near Gemerska Poloma, Slovakia. It occurs in hydrothermal quartz veins intersecting highly fractionated, topaz-zinnwaldite S-type leucogranite. Fluorannjadite-(BaNa) is associated with fluorapatite,'fluordickinsonite-(BaNa)', triplite, viitaniemiite and minor amounts of other minerals. It forms fme-grained irregular aggregates up to 4 cm x 2 cm, which consist of individual anhedral grains up to 0.01 mm in size. It has a yellowish-brown to greenish-yellow colour, very pale yellow streak and a vitreous to greasy lustre. Mobs hardness is similar to 41/2 to 5. The fracture is irregular and the tenacity is brittle. The measured density is 3.61(2) g cm (3) and calculated density is 3.650 g cm (3). Fluorarrojadite-(BaNa) is biaxial (+) and nonpleoclunic. The calculated refractive index based on empirical formula is 1.674. The empirical formula (based on 47 O and 3 (OH + F) apfu) is (A1)(Ba0.65K0.35) Sigma 1.00(A2)Na(0.35)(B)(1)(Na0.54Fe0.46)(Sigma 1.00)Na-B2(0).54(Ca)(Ca0.7Sr0.20Pb0.02Ba0.04)(Sigma 1.00)(Na2Na0.46)-Na-Na3 M(Fe7.16Mn5.17Li0.37Mg0.12SC0.08Zn0.06Ga0.02Ti0.02)Sigma(1)(3.00) Al1.02P11O44PO3.46(OH)(0.54)(F1.54OH0.46).Fluorannjadite-(BaNa) is monoclinic, space group Cc, a = 16.563(1) <(A)overcircle>, b = 10.0476(6) <(A)overcircle>, c = 24.669(1) <(A)overcircle>, p= 105.452(4)degrees, V=3957.5(4) <(A)overcircle>(3) and Z=4. The seven strongest reflections in the powder X-ray diffraction pattern are [d(obs) in <(A)overcircle>, (I) hkl]: 3.412, (21), 116; 3.224, (37), 206; 3.040, (100), 42 (4) over bar; 2.8499, (22), 33 (3) over bar; 2.7135, (56), 226; 2.5563, (33), 028 and 424; 2.5117, (23), 040. The new mineral is named according to the nomenclature scheme of arrojadite-group minerals, approved by the IMA CNMNC. In fluorarrojadite-(BaNa), Fe2+ is a dominant cation at the M site (so the root-name is arrojadite) and two suffixes are added to the root-name according to the dominant cation of the dominant valence state at the Al (Ba2+) and B1 sites (Na+). A prefix fluor is added to the root-name as F is dominant over (OH) at the W site.