Chlorothionite Mineral Data

Chlorothionite Mineral Data

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General Chlorothionite Information

Chemical Formula:

K2Cu(SO4)Cl2

Composition:

Molecular Weight = 308.71 gm

Potassium 25.33 % K 30.51 % K₂O

Copper 20.58 % Cu 25.77 % CuO

Sulfur 10.39 % S 25.93 % SO₃

Chlorine 22.97 % Cl 22.97 % Cl

- % Cl -5.18 % -O=Cl₂

Oxygen 20.73 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂Cu(SO₄)Cl₂

IMA Status:

Valid Species (Pre-IMA) 1872

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 22364

PDF 29-998

Chlorothionite Image

Images:

Chlorothionite

Comments: Pale blue granular crystalline chlorothionite.
Location: Vesuvius, Napoli, Campania, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Chlorothionite Crystallography

Axial Ratios:

a:b:c =1.2717:1:2.6804

Cell Dimensions:

a = 7.73, b = 6.078, c = 16.292, Z = 4; V = 765.45 Den(Calc)= 2.68

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

Crystal Structure:

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Giacovazzo C , Scandale E , Scordari F , Zeitschrift fur Kristallographie , 144 (1976) p.226-237, The crystal structure of chlorotionite, CuK2Cl2SO4, Locality: 1906 eruption of Vesuvius, Italy

Physical Properties of Chlorothionite

Cleavage:

[???] Good

Color:

Light blue.

Density:

2.69

Hardness:

2.5 - Finger Nail

Streak:

white

Optical Properties of Chlorothionite

Optical Data:

NCalc= 1.6 - from Gladstone-Dale relationship (KC = 0.2221) where Ncalc=Dcalc*KC+1
NCalc= 1.6 - from Gladstone-Dale relationship (KC = 0.2221) where Ncalc=Dmeas*KC+1

Calculated Properties of Chlorothionite

Electron Density:

r_electron=2.59 gm/cc
note: r_{Chlorothionite}=2.68 gm/cc.

Fermion Index

Fermion Index = 0.0009
Boson Index = 0.9991

Photoelectric:

PE_{Chlorothionite}= 13.72 barns/electron
U=PE_{Chlorothionite} x r_electron= 35.49 barns/cc.

Radioactivity:

GRapi = 352.79 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Chlorothionite - barely detectable

Chlorothionite Classification

Dana Class:

30.1.11.1 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.1)where (A B)m (XO4)p Zq where m:p>2:1

(30.1.11)Dana Group

30.1.11.1 Chlorothionite K2Cu(SO4)Cl2 P nma 2/m 2/m 2/m

Strunz Class:

VI/B.05-20 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. cations of medium size

VI/B.05 - Fedotovite - Klyuchevskite series

VI/B.05-10 Fedotovite K2Cu3(SO4)3O P 2₁/c 2/m

VI/B.05-20 Chlorothionite K2Cu(SO4)Cl2 P nma 2/m 2/m 2/m

VI/B.05-30 Kamchatkite KCu3OCl(SO4)2 P na2₁ mm2

VI/B.05-40 Piypite K2Cu2(SO4)2O I 4 4

VI/B.05-45 Alumoklyuchevskite K3Cu3AlO2(SO4)4 I2 2

VI/B.05-50 Klyuchevskite K3Cu3(Fe,Al)O2(SO4)4 Unk. Mono

VI/B.05-50* Klyuchevskite-Duplicate K3Cu3FeO2(SO4)4 I2/m, Im, or I2 Mono

Other Chlorothionite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Chlorothionite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Chlorothionite

K2Cu(SO4)Cl2
Dana No: 30.1.11.1 Strunz No: VI/B.05-20
Locality:

Notes: