Grandviewite Mineral Data

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General Grandviewite Information

Chemical Formula:

Cu3Al9(SO4)2(OH)29

Composition:

Molecular Weight = 1,118.81 gm

Aluminum 21.70 % Al 41.01 % Al₂O₃

Copper 17.04 % Cu 19.18 % Cu₂O

Hydrogen 2.61 % H 23.35 % H₂O

Sulfur 5.73 % S 14.31 % SO₃

Oxygen 52.91 % O

______ ______

100.00 % 97.85 % = TOTAL OXIDE

Empirical Formula:

Cu₃Al₉(SO₄)₂(OH)₂₉

Environment:

Secondary mineral in a copper mine.

IMA Status:

Proposed IMA 2007 (Dana # Added)

Locality:

Grandview mine, Grand Canyon National Park, Coconino County, Arizona, USA Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA2007-004

Grandviewite Image

Images:

Grandviewite

Comments: Light blue sprays of fibrous grandviewite crystals associated with blue cyanotrichite.
Location: Grand View mine, Coconino County, Arizona, USA. Scale: See Image.
© George Stevens, Malcom Alter/RRUFF

Grandviewite Crystallography

Axial Ratios:

a:b:c =1.7062:1:1.5826

Cell Dimensions:

a = 10.908, b = 6.393, c = 10.118, Z = 1; beta = 107.47° V = 673.03 Den(Calc)= 2.76

Crystal System:

MonoclinicSpace Group: P 2, Pm or P 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.208(1), 2.413(0.9), 2.99(0.9),3.949(0.79), 5.287(0.35), 9.667(0.33), 2.816(0.14), 3.625(0.1),

Physical Properties of Grandviewite

Color:

Turquoise blue.

Diaphaneity:

Transparent

Habit:

Acicular - Occurs as needle-like crystals.

Luster:

Vitreous (Glassy)

Streak:

light blue

Optical Properties of Grandviewite

Optical Data:

NCalc= 1.65 - from Gladstone-Dale relationship (KC = 0.2345) where Ncalc=Dcalc*KC+1

Calculated Properties of Grandviewite

Electron Density:

Bulk Density (Electron Density)=2.77 gm/cc
note: Specific Gravity of Grandviewite =2.76 gm/cc.

Fermion Index:

Fermion Index = 0.0006878045
Boson Index = 0.9993121955

Photoelectric:

PE_Grandviewite= 8.21 barns/electron
U=PE_Grandviewite x rElectron Density= 22.72 barns/cc.

Radioactivity:

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

Grandviewite Classification

Dana Class:

06.04.14.02 (06)Hydroxides and Oxides Containing Hydroxyl

(06.04)containing multiple cations

(06.04.14)Dana Group

06.04.14.01 Krivovichevite! Pb3[Al(OH)6](SO4)(OH) R 3c 3m

06.04.14.02 Grandviewite! Cu3Al9(SO4)2(OH)29 P 2, Pm or P 2/m Mono

Strunz Class:

07.XX.00 07 - SULFATES (SELENATES, TELLURATES)

07.X - Unclassified Strunz SULFATES (SELENATES, TELLURATES)

07.XX -Unknown

07.XX.00 Blakeite Fe2(TeO3)3 Cubic ? Cubic

07.XX.00 Aiolosite! Na4Bi(SO4)3Cl P 6₃/m 6/m

07.XX.00 Steverustite Pb5(OH)5[Cu(SO3S--)3](H2O)1.67 P 2₁/n 2/m

07.XX.00 Adranosite (NH4)4NaAl2(SO4)4Cl(OH)2 I 4₁/acd 4mm

07.XX.00 Grandviewite! Cu3Al9(SO4)2(OH)29 P 2, Pm or P 2/m Mono

07.XX.00 IMA2009-008 Y2[(UO2)8O6(SO4)4(OH)2]•26H2O P1 1

Other Grandviewite Information

See Also:

Links to other databases for Grandviewite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Grandviewite using:

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Ask about Grandviewite 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 Español

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

Grandviewite

Cu3Al9(SO4)2(OH)29
Dana No: 06.04.14.02 Strunz No: 07.XX.00
Locality:

Notes: