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Mcguinnessite

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About McguinnessiteHide

07071870015357910097699.jpg
Albert L. "Al" McGuinness
Formula:
(Mg,Cu)2(CO3)(OH)2
Colour:
light blue-green, Cu-rich cores slightly darker blue, Mg-rich rims very pale blue-green to nearly white
Lustre:
Vitreous, Silky
Hardness:
Specific Gravity:
3.02 - 3.22
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Albert Leo "Al" McGuinness (17 August 17, 1926, Oakland, California, USA - 29 September 1990, Oregon, USA), mining engineer and mineral collector and dealer. He collected and discovered the mineral.
Rosasite Group.
A Ni-rich mcguinnessite approaching the composition of a hypothetical end-member NiMg(CO3)(OH)2 has been described by Féher et al. (2010).


Classification of McguinnessiteHide

Approved
First Published:
1981
5.BA.10

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
A : With Cu, Co, Ni, Zn, Mg, Mn
16a.3.1.4

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
3 : (AB)2(XO3)Zq
11.3.11

11 : Carbonates
3 : Carbonates of Mg

Physical Properties of McguinnessiteHide

Vitreous, Silky
Transparency:
Translucent
Colour:
light blue-green, Cu-rich cores slightly darker blue, Mg-rich rims very pale blue-green to nearly white
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Comment:
Fracture: Even
Density:
3.02 - 3.22 g/cm3 (Measured)    3.117 g/cm3 (Calculated)
Comment:
Calculated value is for Mg/Cu = 1.17

Optical Data of McguinnessiteHide

Type:
Biaxial (-)
RI values:
nα = 1.596 - 1.602 nβ = 1.724 - 1.730 nγ = 1.724 - 1.732
Max Birefringence:
δ = 0.128 - 0.130
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r < v weak
Pleochroism:
Weak
Comments:
Z,Y (light bluish green); X (very pale green)

Chemical Properties of McguinnessiteHide

Formula:
(Mg,Cu)2(CO3)(OH)2
IMA Formula:
CuMg(CO3)(OH)2

Crystallography of McguinnessiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 9.398(2) Å, b = 12.011(2) Å, c = 3.379(2) Å
β = 93.28(5)°
Ratio:
a:b:c = 0.782 : 1 : 0.281
Unit Cell V:
380.79 ų (Calculated from Unit Cell)
Z:
4
Comment:
May be triclinic. Space Group: P2/a or P21/a

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.015 Å(100)
5.054 Å(16)
3.694 Å(67)
3.002 Å(12)
2.530 Å(25)
2.326 Å(15)
2.139 Å(23)

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of McguinnessiteHide

General Appearance of Type Material:
spherules on joint and vein surfaces
Place of Conservation of Type Material:
U.S. National Museum, Washington, D.C. (NMNH #147169).
Mineralogical Collection of the University P. and M. Curie, Paris.
Geological Setting of Type Material:
Rodingitized metagabbro dikes in a serpentinized peridotite
Associated Minerals at Type Locality:
Reference:
Erd, R.C., Cesbron, F.P., Goff, F.E., and Clark, J.R. (1981) Mcguinnessite, a new carbonate from California. Mineralogical Record: 12: 143-147.

Synonyms of McguinnessiteHide

Other Language Names for McguinnessiteHide

Relationship of Mcguinnessite to other SpeciesHide

Member of:
Other Members of this group:
ChukanoviteFe2+2(CO3)(OH)2Mon. 2/m : P21/b
Glaukosphaerite(Cu,Ni)2(CO3)(OH)2Mon. 2/m : P21/b
ParádsasváriteZn2(CO3)(OH)2Mon. 2/m : P21/b
PokrovskiteMg2(CO3)(OH)2Mon.
Rosasite(Cu,Zn)2(CO3)(OH)2Mon. 2/m : P21/b
Zincrosasite(Zn,Cu)2(CO3)(OH)2Mon.

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Mcguinnessite associated with HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
3 photos of Mcguinnessite associated with CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2O
3 photos of Mcguinnessite associated with Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
3 photos of Mcguinnessite associated with VuagnatiteCaAl(SiO4)(OH)
2 photos of Mcguinnessite associated with Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
2 photos of Mcguinnessite associated with KaoliniteAl2(Si2O5)(OH)4
2 photos of Mcguinnessite associated with DolomiteCaMg(CO3)2
2 photos of Mcguinnessite associated with AragoniteCaCO3
2 photos of Mcguinnessite associated with CupriteCu2O
2 photos of Mcguinnessite associated with MalachiteCu2(CO3)(OH)2

Related Minerals - Nickel-Strunz GroupingHide

5.BA.05AzuriteCu3(CO3)2(OH)2Mon. 2/m : P21/b
5.BA.10GeorgeiteCu2(CO3)(OH)2 · 6H2OAmor.
5.BA.10Glaukosphaerite(Cu,Ni)2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10KolweziteCuCo(CO3)(OH)2Tric.
5.BA.10MalachiteCu2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10NullaginiteNi2(CO3)(OH)2Mon.
5.BA.10PokrovskiteMg2(CO3)(OH)2Mon.
5.BA.10Rosasite(Cu,Zn)2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Zincrosasite(Zn,Cu)2(CO3)(OH)2Mon.
5.BA.10ChukanoviteFe2+2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.15Aurichalcite(Zn,Cu)5(CO3)2(OH)6Mon. 2/m : P21/m
5.BA.15HydrozinciteZn5(CO3)2(OH)6Mon. 2/m : B2/m
5.BA.20HoldawayiteMn6(CO3)2(OH)7(Cl,OH)Mon. 2/m : B2/m
5.BA.25DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x<0.5)Orth. mmm (2/m 2/m 2/m) : Pnma
5.BA.25UM1977-03-COSiO:CaClHCa10-11(CO3)7(SiO4)Cl1-2(OH)1-2Mon.
5.BA.30Loseyite(Mn2+,Zn,Mg)4Zn3(CO3)2(OH)10Mon. 2/m
5.BA.30SclariteZn7(CO3)2(OH)10Mon. 2/m : B2/b

Related Minerals - Dana Grouping (8th Ed.)Hide

16a.3.1.1MalachiteCu2(CO3)(OH)2Mon. 2/m : P21/b
16a.3.1.2Rosasite(Cu,Zn)2(CO3)(OH)2Mon. 2/m : P21/b
16a.3.1.3Glaukosphaerite(Cu,Ni)2(CO3)(OH)2Mon. 2/m : P21/b
16a.3.1.4Zincrosasite(Zn,Cu)2(CO3)(OH)2Mon.
16a.3.1.5PokrovskiteMg2(CO3)(OH)2Mon.
16a.3.1.7KolweziteCuCo(CO3)(OH)2Tric.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.3.1MagnesiteMgCO3Trig. 3m (3 2/m) : R3c
11.3.2BarringtoniteMgCO3 · 2H2OTric.
11.3.3NesquehoniteMgCO3 · 3H2OMon. 2/m : P21/m
11.3.4LansforditeMgCO3 · 5H2OMon. 2/m : P21/b
11.3.5PokrovskiteMg2(CO3)(OH)2Mon.
11.3.6ArtiniteMg2(CO3)(OH)2 · 3H2OMon.
11.3.7HydromagnesiteMg5(CO3)4(OH)2 · 4H2OMon.
11.3.8GiorgiositeMg5(CO3)4(OH)2 · 5-6H2O
11.3.9DypingiteMg5(CO3)4(OH)2 · 5H2OMon.
11.3.10EiteliteNa2Mg(CO3)2Trig.

Fluorescence of McguinnessiteHide

None observed

Other InformationHide

Notes:
Slowly but completely soluble with effervescence in cold dilute mineral acids
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for McguinnessiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Erd, R.C., Cesbron, F.P., Goff, F.E., and Clark, J.R. (1981) Mcguinnessite, a new carbonate from California. Mineralogical Record: 12: 143-147.
Fleischer, M., Cabri, L.J. (1981) New mineral names. American Mineralogist: 66: 1274-1280.
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., and 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 McguinnessiteHide

Localities for McguinnessiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • South Australia
    • Yorke Peninsula
      • Moonta
XRD confirmed by South Australian Museum
  • Western Australia
    • Meekatharra Shire
      • Peak Hill Goldfield
        • Doolgunna Station
Sandfire Resources- Murray Thompson- pers.comm.
Austria
 
  • Carinthia
    • Spittal an der Drau District
      • Weißensee
        • Wurten
Paar, W.H., and Niedermayr, G. (1998): Mitteilungen der Österreichischen Mineralogischen Gesellschaft 143, 425-435.
  • Styria
    • Leoben District
      • Kraubath an der Mur
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)
      • Sankt Stefan ob Leoben
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Murtal District
      • Sankt Margarethen bei Knittelfeld
        • Sankt Lorenzen bei Knittelfeld
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Weiz District
      • Gasen
peter neschen collection
Italy
 
  • Liguria
    • Genoa
      • Cogoleto
Palenzona A. (1996): I nostri minerali. Geologia e mineralogia in Liguria. Aggiornamento 1995. Riv. Mineral. Ital., 20, 2 (2-1996), 149-172.
      • Genoa
        • Borzoli
M.E. Ciriotti, 2006
  • Lombardy
    • Sondrio Province
      • Valtellina
        • Malenco Valley
          • Lanterna Valley
            • Lanzada
Bedognè, F., Montrasio, A., Sciesa, E. (2006) I minerali della media-alta Valtellina, delle Orobie valtellinesi e della Val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.
Japan
 
  • Aichi Prefecture
    • Shinshiro city
Matsubara & Kato (1993) Ganseki-Koubutsu-Koshogaku Zasshi, 88, 517-524.
  • Saitama Prefecture
    • Kodama District
Kosuge, Y. et al (1997) 10, #1, 6-9.
Morocco
 
  • Drâa-Tafilalet Region
    • Zagora Province
      • Aghbar
Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
New Zealand
 
  • Nelson Region
    • Aniseed Valley
Read, A.J. (1983) McGuinnessite from New Zealand; a new occurrence. Mineralogical Magazine, 48: 349, 457-459.
Romania
 
  • Mehedinti
    • Almas Mountains
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.
Russia
 
  • Chelyabinsk Oblast
    • Verkhny Ufaley
      • Ufaley District (Ufalei District)
        • Korkodin
Andrey V Vishnevskiy, IGM SB RAS, Novosibirsk, Russia
South Africa
 
  • Mpumalanga
    • Lydenburg
Zaccarini, F., Garuti, G., & Cawthorn, R. G. (2002). Platinum-group minerals in chromitite xenoliths from the Onverwacht and Tweefontein ultramafic pipes, eastern Bushveld Complex, South Africa. The Canadian Mineralogist, 40(2), 481-497.
Spain
 
  • Andalusia
    • Almería
      • Pechina
        • Baños de Alhamilla
Rewitzer, C., Hochleitner, R. y Fehr, T. Mina Casualidad, Baños de Alhamilla, Almería, Spain (part 2). Mineral Up, 5, (5), 8-36
  • 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 (TL)
 
  • California
    • Mendocino Co.
      • Red Mountain Mining 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.
  • Colorado
    • Park Co.
      • Horseshoe Basin Mining District
James Bauer's Collection
  • Maryland
    • Montgomery Co.
      • Rockville
Min Rec 36:4 pp 435-446
  • Montana
    • Madison Co.
      • Norwegian Mining District (Whitehall Mining District)
Richard Gibson collection
  • Nevada
    • Churchill Co.
      • Clan Alpine Mountains
        • Chalk Mountain Mining District
          • Chalk Mountain
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 Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Nye Co.
      • Gabbs Mining District
        • Gabbs
NBMG Spec. Pub. 31 Minerals of Nevada
  • Pennsylvania
    • Lancaster Co.
      • State Line Chromite Mining District
        • 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
  • Utah
    • Beaver Co.
      • Rocky Range
        • Rocky Mining District
Kampf, A. R., Mills, S. J., Merlino, S., Pasero, M., McDonald, A. M., Wray, W. B., & Hindman, J. R. (2012). Whelanite, Cu2Ca6 [Si6O17 (OH)](CO3)(OH) 3 (H2O) 2, an (old) new mineral from the Bawana mine, Milford, Utah. American Mineralogist, 97(11-12), 2007-2015.
Kampf, A. R., Mills, S. J., Merlino, S., Pasero, M., McDonald, A. M., Wray, W. B., & Hindman, J. R. (2012). Whelanite, Cu2Ca6 [Si6O17 (OH)](CO3)(OH) 3 (H2O) 2, an (old) new mineral from the Bawana mine, Milford, Utah. American Mineralogist, 97(11-12), 2007-2015.
Kampf, A. R., Mills, S. J., Merlino, S., Pasero, M., McDonald, A. M., Wray, W. B., & Hindman, J. R. (2012). Whelanite, Cu2Ca6 [Si6O17 (OH)](CO3)(OH) 3 (H2O) 2, an (old) new mineral from the Bawana mine, Milford, Utah. American Mineralogist, 97(11-12), 2007-2015.
 
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