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Mcguinnessite

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Big Photo

Premier Chemicals Mine (Gabbs Magnesite-Brucite mine; Basic Refractories mine; Basic mine), Gabbs District, Nye Co., Nevada, USA
© Leon Hupperichs

Show Mcguinnessite Photos (37)



Formula:
(Mg,Cu)
 
2
(CO
 
3
)(OH)
 
2
Hardness:2½
Name:Named in honor of California mineralologist Albert L. McGuinness.


Rosasite Group.
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

IMA status:Approved
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

Hardness (Mohs):2½

Optical Data of Mcguinnessite

Type:Biaxial (-)
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.
Surface Relief:High
Dispersion:r < v weak

Chemical Properties of Mcguinnessite

Formula:
(Mg,Cu)
 
2
(CO
 
3
)(OH)
 
2
Essential elements:C, H, Mg, O
All elements listed in formula:C, Cu, H, Mg, O

Relationship of Mcguinnessite to other Species

Structurally related to group(s):
Rosasite Group
Related Minerals - Nickel-Strunz Grouping):

- +
5.BA.05Azurite
Cu
 
3
(CO
 
3
)
 
2
(OH)
 
2
5.BA.10Georgeite
Cu
 
2
(CO
 
3
)(OH)
 
2
 · 6H
 
2
O
5.BA.10Glaukosphaerite
(Cu,Ni)
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Kolwezite
(Cu,Co)
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Malachite
Cu
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Nullaginite
Ni
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Pokrovskite
Mg
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Rosasite
(Cu,Zn)
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Zincrosasite
(Zn,Cu)
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Chukanovite
Fe
2+
2
(CO
 
3
)(OH)
 
2
5.BA.15Aurichalcite
(Zn,Cu)
 
5
(CO
 
3
)
 
2
(OH)
 
6
5.BA.15Hydrozincite
Zn
 
5
(CO
 
3
)
 
2
(OH)
 
6
5.BA.20Holdawayite
Mn
 
6
(CO
 
3
)
 
2
(OH)
 
7
(Cl,OH)
5.BA.25Defernite
Ca
 
6
(CO
 
3
)
 
2-x
(SiO
 
4
)
 
x
(OH)
 
7
(Cl,OH)
 
1-2x
 (x=0.5)
5.BA.25UM1977-03-COSiO:CaClH
Ca
 
10
(SiO
 
4
)(CO
 
3
)
 
7
(Cl,OH)
 
2
5.BA.30Loseyite
(Zn,Mn
2+
 
)
 
7
(CO
 
3
)
 
2
(OH)
 
10
5.BA.30Sclarite
(Zn,Mg,Mn
2+
 
)
 
4
Zn
 
3
(CO
 
3
)
 
2
(OH)
 
10
Related Minerals - Hey's Index Grouping:

- +
11.3.1Magnesite
MgCO
 
3
11.3.2Barringtonite
MgCO
 
3
 · 2H
 
2
O
11.3.3Nesquehonite
MgCO
 
3
 · 3H
 
2
O
11.3.4Lansfordite
MgCO
 
3
 · 5H
 
2
O
11.3.5Pokrovskite
Mg
 
2
(CO
 
3
)(OH)
 
2
11.3.6Artinite
Mg
 
2
(CO
 
3
)(OH)
 
2
 · 3H
 
2
O
11.3.7Hydromagnesite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
 · 4H
 
2
O
11.3.8Giorgiosite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
 · 5-6H
 
2
O
11.3.9Dypingite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
 · 5H
 
2
O
11.3.10Eitelite
Na
 
2
Mg(CO
 
3
)
 
2

Other Names for Mcguinnessite

Synonyms:
IMA1977-027
Other Languages:
German:McGuinnessit
Spanish:McGuinnessita

Other Information

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

Reference List:

- +
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]

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

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    • 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.
    Hide Locality List
    (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.
    Australia
     
    • South Australia
      • Yorke Peninsula
        • Moonta
          • Moonta mines
    		XRD confirmed by South Australian Museum
    Austria
     
    • Carinthia
      • Hohe Tauern Mts
        • Goldberg group
          • Innerfragant
            • Wurten
    		Paar, W.H., and Niedermayr, G. (1998): Mitteilungen der Österreichischen Mineralogischen Gesellschaft 143, 425-435.
    • Styria
      • Leoben
        • Kraubath
    		Postl, W. & Moser, B. (1988): Mineralogische Notizen aus der Steiermark. Mitt. Abt. Miner. Landesmuseum Joanneum, 56, 5-47.; R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
          • St Stefan
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    Italy
     
    • Liguria
      • Genova Province
        • Genova
          • Borzoli
    		M.E. Ciriotti, 2006
    Japan
     
    • Honshu Island
      • Chubu Region
        • Aichi prefecture
          • Shinshiro city
    		Matsubara & Kato (1993) Ganseki-Koubutsu-Koshogaku Zasshi, 88, 517-524.
      • Kanto Region
        • Saitama Prefecture
          • Kodama-gun
    		Kosuge, Y. et al (1997) 10, #1, 6-9.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • Bou Azer District (Bou Azzer District)
            • Aghbar
    		Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV
    New Zealand
     
    • South Island
      • Nelson
        • Aniseed Valley
    		MINERALOGICAL MAGAZINE, SEPTEMBER 1984, VOL. 48, PP. 457-9
    Romania
     
    • Mehedinti Co.
      • Almas Mts.
    		Koller G.,Szakáll S., 2008; 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.
    Spain
     
    • Navarre
      • Esteríbar
        • Eugui
    		Calvo, M. y Viñals, J. (2003). Los minerales de las explotaciones de magnesita de Eugui (Navarra). Revista de Minerales, 2 (4), 6-21.
    USA
     
    • California
      • Mendocino Co.
        • Mayacmas Mts (Mayacamas Mts)
          • Red Mountain District
            • Red Mountain
    		Min.Rec.(1981) 12, 143-147; MINERALOGICAL MAGAZINE, SEPTEMBER 1984, VOL. 48, PP. 457-9
    Erd, R.C., F.B. Cesbron, F.E. Goff, and J.R. Clark (1981) McGuinnessite, a new carbonate from California. Mineralogical Record: 12: 143-147; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 229.
    • Maryland
      • Montgomery Co.
        • Rockville
    		Min Rec 36:4 pp 435-446
    • Nevada
      • Churchill Co.
        • Chalk Mountain District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    NBMG Spec. Pub. 31 Minerals of Nevada
    NBMG Spec. Pub. 31 Minerals of Nevada
    NBMG Spec. Pub. 31 Minerals of Nevada
        • Westgate District
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Nye Co.
        • Gabbs District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • Pennsylvania
      • Lancaster Co.
        • Fulton Township
    		FM newsletter vol.31 no.1 Jan-Mar '01 pg.6
    Personally Collected 4/12/2008, Mark J. Sigouin, Pennsylvania Licenced Professional Geologist
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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