Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-25T15:45:24.759Z Has data issue: false hasContentIssue false
  • English
  • Français

Whiteite-(MnMnMn), a new jahnsite-group mineral species from the Foote mine, North Carolina, USA, and chemical pressure effects in jahnsite-group minerals.

Published online by Cambridge University Press:  18 October 2021

Ian E. Grey Open the ORCID record for Ian E. Grey [Opens in a new window] ,
Jason B. Smith ,
Anthony R. Kampf Open the ORCID record for Anthony R. Kampf [Opens in a new window] ,
W. Gus Mumme ,
Colin M. MacRae ,
Alan Riboldi-Tunnicliffe ,
Stephanie Boer Open the ORCID record for Stephanie Boer [Opens in a new window] ,
Alexander M. Glenn  and
Robert W. Gable
Ian E. Grey*
Affiliation:
CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria3169, Australia
Jason B. Smith
Affiliation:
2148 McClintock Road, Charlotte, NC28205, USA
Anthony R. Kampf
Affiliation:
Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA90007, USA
W. Gus Mumme
Affiliation:
CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria3169, Australia
Colin M. MacRae
Affiliation:
CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria3169, Australia
Alan Riboldi-Tunnicliffe
Affiliation:
Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria3168, Australia
Stephanie Boer
Affiliation:
Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria3168, Australia
Alexander M. Glenn
Affiliation:
CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria3169, Australia
Robert W. Gable
Affiliation:
School of Chemistry, University of Melbourne, Parkville, Victoria3010, Australia.
*
*Author for correspondence: Ian E. Grey, Email: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Whiteite-(MnMnMn), Mn2+Mn2+Mn2+2Al2(PO4)4(OH)2⋅8H2O, is a new whiteite-subgroup member of the jahnsite group from the Foote Lithium Company mine, Kings Mountain district, Cleveland County, North Carolina, USA. It was found in small vugs of partially oxidised pegmatite minerals on the East dump of the mine, in association with eosphorite, hureaulite, fairfieldite, mangangordonite, whiteite-(CaMnMn) and jasonsmithite. It occurs as sugary aggregates of blade-like crystals up to 0.1 mm long and as epitaxial overgrowths on whiteite-(CaMnMn). The crystals are colourless to very pale brown, with a vitreous lustre and a white streak. The blades are flattened on {001} and elongated along [010], with poor cleavage on {001}. The calculated density is 2.82 g⋅cm–3. Optically it is biaxial (–) with α = 1.599(2), β = 1.605(2), γ = 1.609(2) (white light); 2V (calc.) = 78.2°, having no observable dispersion or pleochroism, and with orientation X = b. Electron microprobe analyses and structure refinement gave the empirical formula (Mn2+0.59Ca0.38Na0.03)Σ1.00Mn1.00(Mn2+1.04Fe3+0.58Fe2+0.23Zn0.16Mg0.08)Σ2.09Al2.04(PO4)3.89(OH)3.18(H2O)7.26. Whiteite-(MnMnMn) is monoclinic, P2/a, a = 15.024(3) Å, b = 6.9470(14) Å, c = 9.999(2) Å, β = 110.71(3)°, V = 976.2(4) Å3 and Z = 2. The crystal structure was refined using synchrotron single-crystal data to wRobs = 0.057 for 2014 reflections with I > 3σ(I). Site occupancy refinements confirm the ordering of dominant Mn in the X, M1 and M2 sites of the general jahnsite-group formula XM1(M2)2(M3)2(H2O)8(OH)2(PO4)4. A review of published crystallochemical data for jahnsite-group minerals shows a consistent chemical pressure effect in these minerals, manifested as a contraction of the unit-cell parameter, a, as the mean size of the X and M1 site cations increases. This is analogous to negative thermal expansion, but with increasing cation size, rather than heating, inducing octahedral rotations that result in an anisotropic contraction of the unit cell.

Keywords

whiteite-(MnMnMn)new jahnsite-group mineralcrystal structurechemical pressure
Type
Article
Information
Mineralogical Magazine , Volume 85 , Issue 6 , December 2021 , pp. 862 - 867
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

Associate Editor: Oleg I Siidra

References

Aragao, D., Aishima, J., Cherukuvada, H., Clarken, R., Clift, M., Cowieson, N.P., Ericsson, D.J., Gee, C.L., Macedo, S., Mudie, N., Panjikar, S., Price, J.R., Riboldi-Tunnicliffe, A., Rostan, R., Williamson, R. and Caradoc-Davies, T.T. (2018) MX2: a high-flux undulator microfocus beamline serving both the chemical and macromolecular crystallography communities at the Australian Synchrotron. Journal of Synchrotron Radiation, 25, 885–891.CrossRefGoogle Scholar
Capitelli, F., Chita, G., Cavallo, A., Bellatreccia, F. and Della Ventura, G. (2011) Crystal structure of whiteite-(CaFeMg) from Crosscut Creek, Canada. Zeitschrift fur Kristallographie, 226, 731–738.CrossRefGoogle Scholar
Dowty, E. (2006) ATOMS. Shape Software, Kingsport, Tennessee, USA.Google Scholar
Elliott, P. and Willis, A.C. (2019) Whiteite-(MnMnMg), a new jahnsite-group mineral from Iron Monarch, South Australia: Description and crystal structure. The Canadian Mineralogist, 57, 215–223.CrossRefGoogle Scholar
Gagné, O.C. and Hawthorne, F.C. (2015) Comprehensive derivation of bond-valence parameters for ion pairs involving oxygen. Acta Crystallographica, B71, 562–578.Google Scholar
Grey, I.E., Mumme, W.G., Neville, S.M., Wilson, N.C. and Birch, W.D. (2010) Jahnsite-whiteite solid solutions and associated minerals in the phosphate pegmatite at Hagendorf-Süd, Bavaria, Germany. Mineralogical Magazine, 74, 969–978.CrossRefGoogle Scholar
Grey, I.E., Keck, E., Kampf, A.R., MacRae, C.M., Cashion, J.D. and Glenn, A.M. (2020) Jahnsite-(CaMnZn) from the Hagendorf Süd pegmatite, Oberpfalz, Bavaria, and structural flexibility of jahnsite-group minerals. Mineralogical Magazine, 84, 547–553.CrossRefGoogle Scholar
Grey, I.E., Smit, J.B., Kampf, A.R., Mumme, W.G., Macrae, C.M., Riboldi-Tunnicliffe, A., Boer, S. and Glenn, A.M. (2021) Whiteite-(MnMnMn), IMA 2021-049. CNMNC Newsletter 63, Mineralogical Magazine, 85, https://doi.org/10.1180/mgm.2021.74Google Scholar
Grice, J.D., Dunn, P.J. and Ramik, R.A. (1989) Whiteite-(CaMnMg), a new mineral species from the Tip Top pegmatite, Custer, South Dakota. The Canadian Mineralogist, 27, 699–702.Google Scholar
Grima, J.N., Zammit, V. and Gatt, R. (2006) Negative thermal expansion. Xjenza – Journal of the Malta Chamber of Scientists, 11, 17–29.Google Scholar
Kampf, A.R., Steele, I.M. and Loomis, T.A. (2008) Jahnsite-(NaFeMg), a new mineral from the Tip Top mine, Custer County, South Dakota: Description and crystal structure. American Mineralogist, 93, 940–945.CrossRefGoogle Scholar
Kampf, A.R., Adams, P.M. and Nash, B.P. (2016) Whiteite-(CaMgMg), CaMg3Al2(PO4)4(OH)2.8H2O, a new jahnsite-group mineral from the Northern Belle mine, Candelaria, Nevada, U.S.A. The Canadian Mineralogist, 54, 1513–1523.CrossRefGoogle Scholar
Kampf, A.R., Alves, P., Kasatkin, A. and Skoda, R. (2019) Jahnsite-(MnMnZn), a new jahnsite-group mineral, and formal approval of the jahnsite group. European Journal of Mineralogy, 31, 167–172.CrossRefGoogle Scholar
Kampf, A.R., Celestian, A.J. and Nash, B.P. (2021) Jasonsmithite, a new phosphate mineral with a complex microporous framework, from the Foote mine, North Carolina, U.S.A. American Mineralogist, 106, 174–179.CrossRefGoogle Scholar
Mandarino, J.A. (1981) The Gladstone-Dale relationship: Part IV. The compatibility concept and its application. The Canadian Mineralogist, 19, 441–450.Google Scholar
Marzoni Fecia Di Cossato, Y., Orlandi, P. and Vezzalini, G. (1989) Rittmanite, a new mineral species of the whiteite group from the Mangualde granitic pegmatite, Portugal. The Canadian Mineralogist, 27, 447–449.Google Scholar
Moore, P.B. and Ito, J. (1978) I. Whiteite, a new species, and a proposed nomenclature for the jahnsite-whiteite complex series, II. New data on xanthoxenite. III. Salmonsite discredited. Mineralogical Magazine, 42, 309–323.CrossRefGoogle Scholar
Petříček, V., Dušek, M. and Palatinus, L. (2014) Crystallographic Computing System JANA2006: General features. Zeitschrift fur Kristallographie, 229, 345–352.Google Scholar
Supplementary material: PDF

Grey et al. supplementary material

Grey et al. supplementary material 1

Download Grey et al. supplementary material(PDF)
PDF 358.2 KB
Supplementary material: File

Grey et al. supplementary material

Grey et al. supplementary material 2

Download Grey et al. supplementary material(File)
File 226.7 KB