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Mcguinnessite Mineral Data |
General Mcguinnessite Information |
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(Mg,Cu)2(CO3)(OH)2 | ||
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Molecular Weight = 162.25 gm | ||
Magnesium 22.47 % Mg 37.26 % MgO | |||
Copper 19.58 % Cu 24.51 % CuO | |||
Hydrogen 1.24 % H 11.10 % H2O | |||
Carbon 7.40 % C 27.12 % CO2 | |||
Oxygen 49.30 % O | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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Mg1.5Cu0.5(CO3)(OH)2 | ||
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Occurs in serpentinized peridotite. | ||
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Approved IMA 1981 | ||
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Miners Ridge, Red Mountain, 15 miles SE of Ukiah, Mendocino County, California, USA. Link to MinDat.org Location Data. | ||
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Named for Albert L. McGuinness (1926-1990), mineral dealer, San Mateo, California, USA> | ||
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Mcguinnessite + Pronunciation ![]() |
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Mcguinnessite Image | |||
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Mcguinnessite Crystallography |
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a:b:c =0.7824:1:0.2813 | ||
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a = 9.398, b = 12.011, c = 3.379, Z = 4; beta = 93.28° V = 380.79 Den(Calc)= 2.83 | ||
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Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/a or P 21/a | ||
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By Intensity(I/Io): 6.015(1), 3.694(0.67), 2.14(0.3),2.53(0.25), 2.33(0.2), 5.05(0.2), 3(0.1), 7.4(0.1), | ||
Physical Properties of Mcguinnessite |
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Blue green, Green, White. | ||
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3.02 - 3.22, Average = 3.12 | ||
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Transparent to Translucent | ||
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Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
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Spherical - Spherical, rounded aggregates. | ||
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2.5 - Finger Nail | ||
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Vitreous - Silky | ||
Optical Properties of Mcguinnessite |
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CI meas= -0.039 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.146 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2419,KPDmeas= 0.2194,KC= 0.2112 Ncalc = 1.6 - 1.68 |
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Biaxial (-), a=1.596-1.602, b=1.724-1.73, g=1.724-1.732, bire=0.1280-0.1300 | ||
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very pale green. | ||
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light blue green. | ||
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light blue green. | ||
Calculated Properties of Mcguinnessite |
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Bulk Density (Electron Density)=3.10 gm/cc note: Specific Gravity of Mcguinnessite =3.12 gm/cc. |
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Fermion Index = 0.02 Boson Index = 0.98 |
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PEMcguinnessite = 8.94 barns/electron U=PEMcguinnessite x rElectron Density= 27.69 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mcguinnessite is Not Radioactive |
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Mcguinnessite Classification |
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16a.03.01.05 (16a)Carbonates - Hydroxyl or Halogen | ||
(16a.03)where (A B)2 (XO3) Zq | |||
(16a.03.01)Rosasite Group | |||
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05.BA.10 05 - CARBONATES (NITRATES) | ||
05.B - Carbonates with additional anions, without H2O | |||
05.BA -With Cu, Co, Ni, Zn, Mg, Mn | |||
Other Mcguinnessite Information |
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NAME( MinRec) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
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Links to other databases for Mcguinnessite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - Handbook of Mineralogy (MinSocAm) 7 - MinDAT 8 - Mineralienatlas (Deutsch) 9 - Online Mineral Museum 10 - QUT Mineral Atlas 11 - Ruff.Info Search for Mcguinnessite using: Visit our Advertisers for Mcguinnessite : Ask about Mcguinnessite here : Print or Cut-and-Paste your Mcguinnessite Specimen Label here :
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