Dolerophanite Mineral Data

Dolerophanite Mineral Data +

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General Dolerophanite Information

Chemical Formula:

Cu2(SO4)O

Composition:

Molecular Weight = 239.16 gm

Copper 53.14 % Cu 66.52 % CuO

Sulfur 13.41 % S 33.48 % SO₃

Oxygen 33.45 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₂(SO₄)O

Environment:

Secondary copper mineral in sulfide veins.

IMA Status:

Valid Species (Pre-IMA) 1873

Locality:

Vesuvio (Vesuvius), Napoli, Campania, Italy. Link to MinDat.org Location Data.

Name Origin:

From the Greek "DOLEROS" = misleading and "PHANESTAI" = appearance, in allusion to its low content of copper

Dolerophanite Image

Images:

Click Here for Larger Dolerophanite Image

Dolerophanite Chalcanthite Fedotovite

Comments: Brown crystals of dolerophanite with blue chalcanthite and green fedotovite.
Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Dolerophanite Crystallography

Axial Ratios:

a:b:c =1.4789:1:1.2084

Cell Dimensions:

a = 9.335, b = 6.312, c = 7.628, Z = 4; beta = 122.242° V = 380.16 Den(Calc)= 4.18

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.623(1), 6.443(0.5), 2.615(0.4),

Forms:

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Forms: [ 1 3 3] [ 1 1 0] [ 0 1 0] [ 1 1 1] [ 4 0 3] [ 1 0 0] [ 0 0 1]

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Crystal Structure:

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Effenberger H , Monatshefte fur Chemie , 116 (1985) p.927-931, Cu2O(SO4), dolerophanite: Refinement of the crystal structure with, a comparison of [OCu(II)4] tetrahedra in inorganic compounds, Locality: synthetic

Physical Properties of Dolerophanite

Cleavage:

[101] Perfect

Color:

Brown, Black.

Density:

4.17

Diaphaniety:

Translucent to Opaque

Hardness:

3 - Calcite

Luster:

Sub Metallic

Streak:

yellowish brown

Optical Properties of Dolerophanite

Gladstone-Dale:

CI meas= -0.12 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.117 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1926,KPDmeas= 0.193,KC= 0.1723

Optical Data:

Biaxial (+), a=1.715, b=1.82, g=1.88, bire=0.1650, 2V(Calc)=70, 2V(Meas)=85.

Calculated Properties of Dolerophanite

Electron Density:

r_electron=3.99 gm/cc
note: r_{Dolerophanite}=4.18 gm/cc.

Fermion Index

Fermion Index = 0.00116
Boson Index = 0.99884

Photoelectric:

PE_{Dolerophanite}= 24.31 barns/electron
U=PE_{Dolerophanite} x r_electron= 96.87 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Dolerophanite is Not Radioactive

Dolerophanite Classification

Dana Class:

30.2.2.1 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.2)where (A B)2 XO4 Zq

(30.2.2)Dana Group

30.2.2.1 Dolerophanite Cu2(SO4)O C 2/m 2/m

Strunz Class:

VI/B.01-10 VI - Sulfates,Chromates,Molybdates and Tungstates

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

VI/B.01 - Brochantite series, Dolerophanite - Brochantite

VI/B.01-10 Dolerophanite Cu2(SO4)O C 2/m 2/m

VI/B.01-20 Antlerite Cu3(SO4)(OH)4 Pnam 2/m 2/m 2/m

VI/B.01-30 Brochantite Cu4(SO4)(OH)6 P 2₁/a 2/m

Other Dolerophanite Information

References:

NAME( Dana7) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Dolerophanite :
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 Dolerophanite Specimen Label here :

Dolerophanite

Cu2(SO4)O
Dana No: 30.2.2.1 Strunz No: VI/B.01-10
Locality:

Notes: