Klyuchevskite Mineral Data

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General Klyuchevskite Information

Chemical Formula:

K3Cu3(Fe+++,Al)O2(SO4)4

Composition:

Molecular Weight = 765.60 gm

Potassium 15.32 % K 18.46 % K₂O

Aluminum 1.76 % Al 3.33 % Al₂O₃

Iron 3.65 % Fe 5.21 % Fe₂O₃

Copper 24.90 % Cu 31.17 % CuO

Sulfur 16.75 % S 41.83 % SO₃

Oxygen 37.62 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₃Cu₃Fe³⁺_0.5Al_0.5O₂(SO₄)₄

Environment:

Volcanic fumaroles.

IMA Status:

Approved IMA 1989

Locality:

Great Tolbachik fissure eruption, Kamchatka, Russia. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Name Pronunciation:

Klyuchevskite + Pronunciation

Synonym:

ICSD 67698

PDF 41-1463

Klyuchevskite Image

Images:

Click Here for Larger Klyuchevskite Image

Klyuchevskite Klyuchevskite-Duplicate

Comments: Clusters of dark green radiating prismatic klyuchevskite crystals associated with langbeinite, co-type sample. Klyuchevskite-duplicate is the same mineral with different Dana numbers.
Location: Yadevitaya fumarole, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: See Image.
© Rruff Database

Klyuchevskite Crystallography

Axial Ratios:

a:b:c =3.6868:1:3.7324

Cell Dimensions:

a = 18.412, b = 4.994, c = 18.64, Z = 4; beta = 101.5° V = 1,679.53 Den(Calc)= 3.03

Crystal System:

MonoclinicSpace Group: Unk.

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

By Intensity(I/I_o): 9.03(1), 3.76(0.6), 7.2(0.4),3.41(0.3), 4.5(0.3), 3.45(0.2), 3.68(0.2),

Crystal Structure:

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Gorskaya M G , Filatov S K , Rozhdestvenskaya I V , Vergasova L P , Mineralogical Magazine , 56 (1992) p.411-416, The crystal structure of klyuchevskite, K3Cu3(Fe,Al)O2(SO4)4,, a new mineral from Kamchatka volcanic sublimates, Locality: Tolbachik Main Fracture Eruption, Kamchatka Peninsula, Russia

Physical Properties of Klyuchevskite

Cleavage:

{???} Perfect

Color:

Dark green, Olive green.

Density:

3 - 3.15, Average = 3.07

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Hardness:

2.5 - Finger Nail

Luster:

Sub Metallic

Streak:

green light

Optical Properties of Klyuchevskite

Gladstone-Dale:

CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.049 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1957,KPDmeas= 0.1928,KC= 0.1865
Ncalc = 1.56 - 1.59

Optical Data:

Biaxial (-), a=1.549, b=1.55, g=1.68, bire=0.1310

Pleochroism (x):

olive.

Pleochroism (y):

green.

Pleochroism (z):

dark olive.

Calculated Properties of Klyuchevskite

Electron Density:

Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Klyuchevskite =3.08 gm/cc.

Fermion Index:

Fermion Index = 0.0022286672
Boson Index = 0.9977713328

Photoelectric:

PE_{Klyuchevskite}= 14.54 barns/electron
U=PE_{Klyuchevskite} x r_electron= 43.40 barns/cc.

Radioactivity:

GRapi = 214.52 (Gamma Ray American Petroleum Institute Units)
Concentration of Klyuchevskite per GRapi unit = 0.47 (%)

Estimated Radioactivity from Klyuchevskite - barely detectable

Klyuchevskite Classification

Dana Class:

28.04.06.01 (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 Klyuchevskite Information

References:

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

See Also:

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

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Klyuchevskite

K3Cu3(Fe+++,Al)O2(SO4)4
Dana No: 28.04.06.01 Strunz No: 07.BC.45
Locality:

Notes: