General Mcguinnessite Information![]() (Mg,Cu)2(CO3)(OH)2 |
![]() Molecular Weight = 162.25 gm |
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Magnesium 22.47 % Mg 37.26 % MgO |
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Copper 19.58 % Cu 24.51 % CuO |
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Hydrogen 1.24 % H 11.10 % H2O |
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Carbon 7.40 % C 27.12 % CO2 |
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Oxygen 49.30 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
![]() Mg1.5Cu0.5(CO3)(OH)2 |
![]() Occurs in serpentinized peridotite. |
![]() Approved IMA 1981 |
![]() Miners Ridge, Red Mountain, 15 miles SE of Ukiah, Mendocino County, California, USA. Link to MinDat.org Location Data. |
![]() Named for Albert L. McGuinness (1926-1990), mineral dealer, San Mateo, California, USA> |
![]() Mcguinnessite + Pronunciation |
![]() | | Mcguinnessite Image
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Mcguinnessite Crystallography![]() a:b:c =0.7824:1:0.2813 |
![]() a = 9.398, b = 12.011, c = 3.379, Z = 4; beta = 93.28° V = 380.79 Den(Calc)= 2.83 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a or P 21/a |
![]() 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![]() Blue green, Green, White. |
![]() 3.02 - 3.22, Average = 3.12 |
![]() Transparent to Translucent |
![]() Brittle - Generally displayed by glasses and most non-metallic minerals. |
![]() Spherical - Spherical, rounded aggregates. |
![]() 2.5 - Finger Nail |
![]() Vitreous - Silky |
| Optical Properties of Mcguinnessite![]() 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 ![]() Biaxial (-), a=1.596-1.602, b=1.724-1.73, g=1.724-1.732, bire=0.1280-0.1300 |
![]() very pale green. |
![]() light blue green. |
![]() light blue green. |
| Calculated Properties of Mcguinnessite![]() Bulk Density (Electron Density)=3.10 gm/cc |
note: Specific Gravity of Mcguinnessite =3.12 gm/cc. ![]() Fermion Index = 0.02 |
Boson Index = 0.98 ![]() PEMcguinnessite = 8.94 barns/electron |
U=PEMcguinnessite x rElectron Density= 27.69 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Mcguinnessite is Not Radioactive | Mcguinnessite Classification![]() 16a.03.01.05 (16a)Carbonates - Hydroxyl or Halogen |
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(16a.03)where (A B)2 (XO3) Zq |
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(16a.03.01)Rosasite Group |
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![]() 05.BA.10 05 - CARBONATES (NITRATES) |
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05.B - Carbonates with additional anions, without H2O |
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05.BA -With Cu, Co, Ni, Zn, Mg, Mn |
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| Other Mcguinnessite Information![]() NAME( MinRec) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) |
![]() 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 : A Bijoux Google Search for McguinnessiteAdam's Minerals Google Search for Mcguinnessite Cape Minerals Google Search for Mcguinnessite Dakota Matrix Minerals Google Search for Mcguinnessite Excalibur Mineral Corp. Google Search for Mcguinnessite Exceptional Minerals Google Search for Mcguinnessite John Betts Fine Minerals Search for Mcguinnessite McDougall Minerals Google Search for Mcguinnessite Mineral News Website Link Rock and Mineral Shows Google Search for Mcguinnessite Weinrich Minerals, Inc. Google Search for Mcguinnessite Ask about Mcguinnessite here : Print or Cut-and-Paste your Mcguinnessite Specimen Label here :
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