Next Article in Journal
Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings
Next Article in Special Issue
Effect of Grinding on Chrysotile, Amosite and Crocidolite and Implications for Thermal Treatment
Previous Article in Journal
Effective-Medium Inversion of Induced Polarization Data for Mineral Exploration and Mineral Discrimination: Case Study for the Copper Deposit in Mongolia
Previous Article in Special Issue
Different Erionite Species Bind Iron into the Structure: A Potential Explanation for Fibrous Erionite Toxicity
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Minerals 2018, 8(2), 69; https://doi.org/10.3390/min8020069

Prismatic to Asbestiform Offretite from Northern Italy: Occurrence, Morphology and Crystal-Chemistry of a New Potentially Hazardous Zeolite

1
Department of Pure and Applied Sciences, University of Urbino Carlo Bo, Scientific Campus E. Mattei, via Cà le Suore 2, 61029 Urbino, Italy
2
Department of Biomolecular Sciences, University of Urbino Carlo Bo, Scientific Campus E. Mattei, via Cà le Suore 2, 61029 Urbino, Italy
3
Museum of Archeological and Natural Sciences “G. Zannato”, Montecchio Maggiore, 36075 Veneto, Italy
4
Department of Earth Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Roma, Italy
5
Rectorial Laboratory Fibres and Inorganic Particulate, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Roma, Italy
*
Author to whom correspondence should be addressed.
Received: 21 January 2018 / Revised: 10 February 2018 / Accepted: 12 February 2018 / Published: 14 February 2018
(This article belongs to the Special Issue Occurrence, Crystal-Chemistry and Properties of Fibrous Minerals)
Full-Text   |   PDF [1746 KB, uploaded 23 February 2018]   |  

Abstract

A multi-methodological approach, based upon field investigation, morphological characterization, chemical analysis and structure refinement was applied to different samples of fibrous offretite, a new potentially hazardous zeolite recently discovered in northern Italy. Their morphology ranges from stocky-prismatic to asbestiform. All the investigated fibers may be considered as “inhalable”, and they are well within the range of the “more carcinogenic fibers” regarding diameter. As regards the length, the main mode observed in the asbestiform samples is 20–25 μm, and ~93% of the measured fibers are >5 μm and may be significantly associated with carcinogenesis also in terms of lengths. The chemical-structural features of the investigated fibers are comparable: the extra-framework cations K+, Mg2+ and Ca2+ are present in all samples in similar proportions, and refined cell parameters are similar among the samples. Offretite occurs in 60% of the investigated sites, with an estimated amount up to 75 vol % of the associated minerals. The presence of this mineral could be of concern for risk to human health, especially if one considers the vast number of quarries and mining-related activities that are operating in the zeolite host rocks. View Full-Text
Keywords: zeolites; offretite; fibers; carcinogenic; human health; Italy zeolites; offretite; fibers; carcinogenic; human health; Italy
Figures

Figure 1a

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Mattioli, M.; Giordani, M.; Arcangeli, P.; Valentini, L.; Boscardin, M.; Pacella, A.; Ballirano, P. Prismatic to Asbestiform Offretite from Northern Italy: Occurrence, Morphology and Crystal-Chemistry of a New Potentially Hazardous Zeolite. Minerals 2018, 8, 69.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top