Mcguinnessite Mineral Data (original) (raw)

General Mcguinnessite Information

Help on Chemical Formula: Chemical Formula:

(Mg,Cu)2(CO3)(OH)2

Help on Composition: Composition:

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

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Mg1.5Cu0.5(CO3)(OH)2

Help on Environment: Environment:

Occurs in serpentinized peridotite.

Help on IMA Status: IMA Status:

Approved IMA 1981

Help on Locality: Locality:

Miners Ridge, Red Mountain, 15 miles SE of Ukiah, Mendocino County, California, USA. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Albert L. McGuinness (1926-1990), mineral dealer, San Mateo, California, USA>

Help on Name Pronunciation: Name Pronunciation:

Mcguinnessite + Pronunciation Say MCGUINNESSITE

Mcguinnessite Image

Click Here for Larger Mcguinnessite Image in a New Browser Window Images:

Click Here for Larger Mcguinnessite Image in a New Browser Window Images:

Mcguinnessite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.7824:1:0.2813

Help on Cell Dimensions: Cell Dimensions:

a = 9.398, b = 12.011, c = 3.379, Z = 4; beta = 93.28° V = 380.79 Den(Calc)= 2.83

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a or P 21/a

Help on X Ray Diffraction: X Ray Diffraction:

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

Help on Color: Color:

Blue green, Green, White.

Help on Density: Density:

3.02 - 3.22, Average = 3.12

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Spherical - Spherical, rounded aggregates.

Help on Hardness: Hardness:

2.5 - Finger Nail

Help on Luster: Luster:

Vitreous - Silky

Optical Properties of Mcguinnessite

Help on Gladstone-Dale: Gladstone-Dale:

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

Help on Optical Data: Optical Data:

Biaxial (-), a=1.596-1.602, b=1.724-1.73, g=1.724-1.732, bire=0.1280-0.1300

Help on Pleochroism (x): Pleochroism (x):

very pale green.

Help on Pleochroism (y): Pleochroism (y):

light blue green.

Help on Pleochroism (z): Pleochroism (z):

light blue green.

Calculated Properties of Mcguinnessite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.10 gm/cc
note: Specific Gravity of Mcguinnessite =3.12 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Help on Photoelectric: Photoelectric:

PEMcguinnessite = 8.94 barns/electron
U=PEMcguinnessite x rElectron Density= 27.69 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mcguinnessite is Not Radioactive

Mcguinnessite Classification

Help on Dana Class: Dana Class:

16a.03.01.05 (16a)Carbonates - Hydroxyl or Halogen

(16a.03)where (A B)2 (XO3) Zq

(16a.03.01)Rosasite Group

16a.03.01.01 Rosasite (Cu,Zn)2(CO3)(OH)2 P 21/a 2/m

16a.03.01.02 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 21/a 2/m

16a.03.01.03 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri

16a.03.01.04 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 21/a 2/m

16a.03.01.05 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 21/a 2/m

Help on Strunz Class: Strunz Class:

05.BA.10 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BA -With Cu, Co, Ni, Zn, Mg, Mn

05.BA.10 Nullaginite Ni2(CO3)(OH)2 P 21/m,P 21 Mono

05.BA.10 Georgeite Cu5(CO3)3(OH)4•6(H2O) None

05.BA.10 Malachite Cu2(CO3)(OH)2 P 21/a 2/m

05.BA.10 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 21/a 2/m

05.BA.10 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 21/a 2/m

05.BA.10 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri

05.BA.10 Pokrovskite Mg2(CO3)(OH)2•0.5(H2O) P 21/a 2/m

05.BA.10 Rosasite (Cu,Zn)2(CO3)(OH)2 P 21/a 2/m

05.BA.10 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 21/a 2/m

05.BA.10 Chukanovite! Fe2(CO3)(OH)2 P 21/a 2/m

Other Mcguinnessite Information

Help on References: References:

NAME( MinRec) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

Help on See Also: See Also:

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:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Mcguinnessite :

A Bijoux Google Search for Mcguinnessite
Adam'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 :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

Print or Cut-and-Paste your Mcguinnessite Specimen Label here :

Mcguinnessite

(Mg,Cu)2(CO3)(OH)2
Dana No: 16a.03.01.05 Strunz No: 05.BA.10
Locality:

Notes: