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|Name:||Named in honor of California mineralologist Albert L. McGuinness.|
A Ni-rich mcguinessite approaching the composition of a hypothetical end-member NiMg(CO3)(OH)2 has been described by Féher et al. (2010).
Classification of Mcguinnessite
|Strunz 8th edition ID:||5/C.01-40|
|Nickel-Strunz 10th (pending) edition ID:||5.BA.10|
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
A : With Cu, Co, Ni, Zn, Mg, Mn
|Dana 8th edition ID:||16a.3.1.4|
16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
3 : (AB)2(XO3)Zq
|Hey's CIM Ref.:||11.3.11|
11 : Carbonates
3 : Carbonates of Mg
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Type Occurrence of Mcguinnessite
|Type Locality:||Copper King Mine, Red Mountain, Red Mountain District, Mayacmas Mts (Mayacamas Mts), Mendocino Co., California, USA|
Physical Properties of Mcguinnessite
Optical Data of Mcguinnessite
|RI values:||nα = 1.596 - 1.602 nβ = 1.724 - 1.730 nγ = 1.724 - 1.732|
|Maximum Birefringence:||δ = 0.128 - 0.130|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||r < v weak|
Chemical Properties of Mcguinnessite
|Essential elements:||C, H, Mg, O|
|All elements listed in formula:||C, Cu, H, Mg, O|
Relationship of Mcguinnessite to other Species
|Member of:||Rosasite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Mcguinnessite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Mcguinnessite
American Mineralogist (1981): 66: 1276.
Erd, R. C., Cesbron, F. P., Goff, F. E. & Clark, J. R. (1981): Mcguinnessite, a new carbonate from California: Mineralogical Record: 12: 143-147.
Perchiazzi, N. (2004). EPDIC European Powder diffraction conference Praha 2004, 11, 76.
Perchiazzi, N. (2006): Crystal structure determination and Rietveld refinement of rosasite and mcguinnessite. Zeitschrift für Kristallographie, Suppl. No. 23, 505-510. [http://www.atypon-link.com/OLD/doi/pdf/10.1524/zksu.2006.suppl_23.505 [Link Broken? Dec 2013]]
Fehér, B., Szakáll, S. & Bigi, S. (2010): Ni-rich mcguinnessite from Eibenthal, Romania: an intermediate phase toward a new hypothetical rosasite-group end-member. 20th General Meeting of the IMA (IMA2010), Budapest, Hungary, August 21-27, CD of Abstracts, p. 495.
Internet Links for Mcguinnessite
Localities for Mcguinnessite
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Manikan (Maniken), Kaweah, Tulare Co., California, USAFrom Chester S. Lemanski, Jr., 6th Dec 2013 16:02:35