Celleriite, ☐(⁠Mn22+Al)Al6(Si6O18)(BO3)3(OH)3(OH), a new mineral species of the tourmaline supergroup

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00119496" target="_blank" >RIV/00216224:14310/22:00119496 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.2138/am-2021-7818" target="_blank" >https://doi.org/10.2138/am-2021-7818</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2138/am-2021-7818" target="_blank" >10.2138/am-2021-7818</a>

Result language

angličtina

Original language name

Celleriite, ☐(⁠Mn22+Al)Al6(Si6O18)(BO3)3(OH)3(OH), a new mineral species of the tourmaline supergroup

Original language description

Celleriite, ☐(⁠Mn2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH), is a new mineral of the tourmaline supergroup. It was discovered in the Rosina pegmatite, San Piero in Campo, Elba Island, Italy (holotype specimen), and in the Pikárec pegmatite, western Moravia, Czech Republic (co-type specimen). Celleriite in hand specimen is violet to gray-blue (holotype) and dark brownish-green (co-type) with a vitreous luster, conchoidal fracture, and white streak. Celleriite has a Mohs hardness of ~7 and a calculated density of 3.13 and 3.14 g/cm3 for holotype and its co-type, respectively. In plane-polarized light in thin section, celleriite is pleochroic (O = pale violet and E = light gray-blue in holotype; O = pale green and E = colorless in co-type) and uniaxial negative. Celleriite has trigonal symmetry: space group R3m, Z = 3, a = 15.9518(4) and 15.9332(3) Å, c = 7.1579(2) and 7.13086(15) Å, V = 1577.38(9) and 1567.76(6) Å3 for holotype and co-type, respectively (data from single-crystal X-ray diffraction). The crystal structure of the holotype specimen was refined to R1 = 2.89% using 1696 unique reflections collected with MoKα X-ray intensity data. Structural, chemical, and spectroscopic analyses resulted in the formulas: x(□0.58Na0.42)Σ1.00Y(Mn2+1.39Fe2+0.16Mg0.01Al1.14Fe3+0.01Li0.28Ti0.01)Σ3.00ZAl6[T(Si5.99Al0.01)Σ6.00O18] (BO3)3(OH)3w[(OH)0.65F0.03O0.32]Σ1.00(for holotype) and x(□0.51Na0.49)Σ1.00Y(Mn2+0.90Fe2+0.50Al1.36Fe3+0.04Li0.17Zn0.04)Σ3.00ZAl6[T(Si5.75B0.25)Σ6.00O18] (BO3)3(OH)3w[(OH)0.35F0.17O0.48]Σ1.00(for co-type) Celleriite is a hydroxy species belonging to the X-site vacant group of the tourmaline supergroup. The new mineral was approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association, proposal no. 2019-089. In the Rosina pegmatite, celleriite formed an overgrowth at the analogous pole of elbaite–fluorelbaite–rossmanite crystals during the latest stage of evolution of pegmatite cavities after an event of a pocket rupture. In the Pikárec pegmatite, celleriite occurs as an intermediate growth sector of elbaite, princivalleite, and fluor-elbaite.

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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

American Mineralogist

ISSN

0003-004X

e-ISSN

1945-3027

Volume of the periodical

107

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

31-42

UT code for WoS article

000736146300003

EID of the result in the Scopus database

2-s2.0-85122727046