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Meierite, a new barium mineral with a Kfi-type zeolite framework from the Gun Claim, Yukon Canada

R. C. Peterson, Gunnar Farber, R. James Evans, Lee A. Groat, Laura MacNeil, Brian Joy, Barbara Lafuente and Thomas Witzke
Meierite, a new barium mineral with a Kfi-type zeolite framework from the Gun Claim, Yukon Canada
The Canadian Mineralogist (September 2016) 54 (5): 1249-1259

Abstract

Meierite, ideally Ba (sub 44) Si (sub 66) Al (sub 30) O (sub 192) Cl (sub 25) (OH) (sub 33) , is a new mineral from the Gun claim, just south of the Itsi Range, Yukon, Canada. Meierite occurs as equant grains up to 200 mu m across, enclosed within large gillespite crystals. The mineral is transparent, has a vitreous luster, and is non-fluorescent. It has a white streak and Mohs hardness of approximately 51/2. It is brittle with no observed cleavage. The calculated density based upon the chemical formula and single-crystal unit-cell dimension is 3.50 g/cm (super 3) The mineral is optically isotropic (n=1.598) Electron-microprobe composition (average of 11): SiO (sub 2) 28.30, P (sub 2) O (sub 5) 1.61, Al (sub 2) O (sub 3) 11.75, TiO (sub 2) 0.05, FeO 0.27, CaO 0.21, BaO 47.61, Na (sub 2) O 0.15, K (sub 2) O 0.21, Cl 6.64, and a total of 95.29 wt.%. The empirical formula (based on 192 framework O apfu) and charge balance considerations is: Ba (sub 41.1) Ba (sub 0.5) Fe (sub 0.5) Na (sub 0.7) K (sub 0.6) Si (sub 62.5) Al (sub 30.5) P (sub 3.0) O (sub 192) Cl (sub 24.8) .33.4(OH). It is possible that additional H (sub 2) O molecules are located within the cavities in the structure. Meierite is cubic, Im3m, a 18.5502(4) Aa, V 6383.3(2) Aa (super 3) , and Z=1. The 10 most intense lines in the X-ray powder diffraction pattern are [d (sub obs) in A(I)(hkl)]: 4.39(70)(411), 4.16(26)(420), 3.798(25)(422), 3.288(34)(440), 3.189(100)(433), 3.016(72)(611), 2.803(42)(622), 2.629(31)(710), 2.323(46)(800), and 2.287(59)(741). The crystal structure (R=4.1% for 1393 F (sub o) >4sigma F) is a three dimensional framework of silicon-, aluminium-, and phosphorous-containing tetrahedra that create an open framework consisting of a large cubo-octahedral cavity connected by channels composed of double eight-membered rings and double six-membered rings. The aluminosilicate framework is isostructural with that observed for silicate framework type ZK-5 (KFI). The mineral is named in honor of Walter M. Meier (1926-2009), a pioneer in zeolite research.


ISSN: 0008-4476
EISSN: 1499-1276
Coden: CAMIA6
Serial Title: The Canadian Mineralogist
Serial Volume: 54
Serial Issue: 5
Title: Meierite, a new barium mineral with a Kfi-type zeolite framework from the Gun Claim, Yukon Canada
Affiliation: Queen's University, Department of Geological Sciences and Geological Engineering, Kingston, ON, Canada
Pages: 1249-1259
Published: 201609
Text Language: English
Publisher: Mineralogical Association of Canada, Ottawa, ON, Canada
References: 28
Accession Number: 2017-080356
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 7 tables
N62°50'50" - N62°50'50", W130°00'51" - W130°00'51"
Secondary Affiliation: University of British Columbia, CAN, CanadaPANalytical, CAN, CanadaUniversity of Arizona, USA, United States
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Association of Canada. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201742
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