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@article{1509316,
author = {Stevko, M. and Sejkora, J. and Uher, P. and Camara, F. and Škoda, Radek and Vaculovič, Tomáš},
article_location = {Middlesex},
article_number = {4},
doi = {http://dx.doi.org/10.1180/minmag.2017.081.066},
keywords = {fluorarrojadite-(BaNa); new mineral; arrojadite group; phosphates; Raman spectroscopy; S-type granite; Gemerska Poloma; Slovakia},
language = {eng},
issn = {0026-461X},
journal = {Mineralogical Magazine},
title = {Fluorarrojadite-(BaNa), BaNa4CaFe13Al(PO4)(11)(PO3OH)F-2, a new member of the arrojadite group from Gemerska Poloma, Slovakia},
url = {http://dx.doi.org/10.1180/minmag.2017.081.066},
volume = {82},
year = {2018}
}
TY - JOUR
ID - 1509316
AU - Stevko, M. - Sejkora, J. - Uher, P. - Camara, F. - Škoda, Radek - Vaculovič, Tomáš
PY - 2018
TI - Fluorarrojadite-(BaNa), BaNa4CaFe13Al(PO4)(11)(PO3OH)F-2, a new member of the arrojadite group from Gemerska Poloma, Slovakia
JF - Mineralogical Magazine
VL - 82
IS - 4
SP - 863-876
EP - 863-876
PB - Mineralogical Society
SN - 0026461X
KW - fluorarrojadite-(BaNa)
KW - new mineral
KW - arrojadite group
KW - phosphates
KW - Raman spectroscopy
KW - S-type granite
KW - Gemerska Poloma
KW - Slovakia
UR - http://dx.doi.org/10.1180/minmag.2017.081.066
N2 - 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.
ER -
STEVKO, M., J. SEJKORA, P. UHER, F. CAMARA, Radek ŠKODA a Tomáš VACULOVIČ. Fluorarrojadite-(BaNa), BaNa4CaFe13Al(PO4)(11)(PO3OH)F-2, a new member of the arrojadite group from Gemerska Poloma, Slovakia. \textit{Mineralogical Magazine}. Middlesex: Mineralogical Society, 2018, roč.~82, č.~4, s.~863-876. ISSN~0026-461X. Dostupné z: https://dx.doi.org/10.1180/minmag.2017.081.066.
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