Alumoklyuchevskite Mineral Data

General Alumoklyuchevskite Information

Chemical Formula:

K3Cu3AlO2(SO4)4

Composition:

Molecular Weight = 751.17 gm

Potassium 15.62 % K 18.81 % K₂O

Aluminum 3.59 % Al 6.79 % Al₂O₃

Copper 25.38 % Cu 31.77 % CuO

Sulfur 17.08 % S 42.63 % SO₃

Oxygen 38.34 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₃Cu₃AlO₂(SO₄)₄

Environment:

A volcanic exhalation.

IMA Status:

Approved IMA 1995

Locality:

The second cone of the Northern Breakthrough of the Main Tolbachik fracture eruption, Kamchatka, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the aluminum dominant analog of klyuchevskite.

Synonym:

IMA1993-004

Alumoklyuchevskite Image

Images:

Alumoklyuchevskite

Comments: Very small olive-greenish prismatic crystals of alumoklyuchevskite.
Location: Tolbachik volcano, Kamchatka, Russia. Scale: Sample size 1.8 x 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Alumoklyuchevskite

Comments: Green blebs to prismatic or needle-like crystals of alumoklyuchevskite associated with vergasovaite, co-type material.
Location: Main fracture, N breakthrough, Tolbachik Volcano, Kamchatka Peninsula, Russia. Scale: See Image.
© Rruff Database

Alumoklyuchevskite Crystallography

Axial Ratios:

a:b:c =3.5866:1:3.6368

Cell Dimensions:

a = 18.432, b = 5.139, c = 18.69, Z = 4; beta = 101.12° V = 1,737.12 Den(Calc)= 2.87

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: I2

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

By Intensity(I/I_o): 9.04(1), 9.15(0.84), 3.781(0.37),

Physical Properties of Alumoklyuchevskite

Cleavage:

{001} Perfect

Color:

Dark green.

Density:

3.1

Diaphaneity:

Transparent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

light green

Optical Properties of Alumoklyuchevskite

Gladstone-Dale:

CI meas= -0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.115 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.201,KPDmeas= 0.1861,KC= 0.1804
Ncalc = 1.52 - 1.56

Optical Data:

Biaxial (+), a=1.542, b=1.548, g=1.641, bire=0.0990, 2V(Calc)=30, 2V(Meas)=30.

Pleochroism (x):

light green.

Pleochroism (y):

grayish green.

Pleochroism (z):

dark green.

Calculated Properties of Alumoklyuchevskite

Electron Density:

Bulk Density (Electron Density)=3.01 gm/cc
note: Specific Gravity of Alumoklyuchevskite =3.10 gm/cc.

Fermion Index:

Fermion Index = 0.0014834108
Boson Index = 0.9985165892

Photoelectric:

PE_{Alumoklyuchevskite}= 13.74 barns/electron
U=PE_{Alumoklyuchevskite} x r_electron= 41.40 barns/cc.

Radioactivity:

GRapi = 218.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Alumoklyuchevskite per GRapi unit = 0.46 (%)

Estimated Radioactivity from Alumoklyuchevskite - barely detectable

Alumoklyuchevskite Classification

Dana Class:

28.04.06.02 (28)Anhydrous Acid and Sulfates

(28.04)with miscellaneous formulae

(28.04.06)Klyuchevskite Group

28.04.06.01 Klyuchevskite K3Cu3(Fe,Al)O2(SO4)4 Unk. Mono

28.04.06.02 Alumoklyuchevskite K3Cu3AlO2(SO4)4 I2 2

Strunz Class:

07.BC.45 07 - SULFATES (SELENATES, TELLURATES)

07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O

07.BC -With medium-sized and large cations

07.BC.45 Alumoklyuchevskite K3Cu3AlO2(SO4)4 I2 2

07.BC.45 Klyuchevskite-Duplicate K3Cu3FeO2(SO4)4 I2/m, Im, or I2 Mono

07.BC.45 Klyuchevskite K3Cu3(Fe,Al)O2(SO4)4 Unk. Mono

Other Alumoklyuchevskite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Alumoklyuchevskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

Search for Alumoklyuchevskite using:

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

Visit our Advertisers for Alumoklyuchevskite :

A Bijoux Google Search for Alumoklyuchevskite
Adam's Minerals Google Search for Alumoklyuchevskite
Cape Minerals Google Search for Alumoklyuchevskite
Dakota Matrix Minerals Google Search for Alumoklyuchevskite
Excalibur Mineral Corp. Google Search for Alumoklyuchevskite
Exceptional Minerals Google Search for Alumoklyuchevskite
John Betts Fine Minerals Search for Alumoklyuchevskite
McDougall Minerals Google Search for Alumoklyuchevskite
Mineral News Website Link
Rock and Mineral Shows Google Search for Alumoklyuchevskite
Weinrich Minerals, Inc. Google Search for Alumoklyuchevskite

Ask about Alumoklyuchevskite 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 Alumoklyuchevskite Specimen Label here :

Alumoklyuchevskite

K3Cu3AlO2(SO4)4
Dana No: 28.04.06.02 Strunz No: 07.BC.45
Locality:

Notes: