Dolerophanite Mineral Data

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

Name Pronunciation:

Dolerophanite + Pronunciation

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

Diaphaneity:

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
Ncalc = 1.72

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:

Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Dolerophanite =4.18 gm/cc.

Fermion Index:

Fermion Index = 0.0011661624
Boson Index = 0.9988338376

Photoelectric:

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

Radioactivity:

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

Dolerophanite Classification

Dana Class:

30.02.02.01 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.02)where (A B)2 XO4 Zq

(30.02.02)Dana Group

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

Strunz Class:

07.BB.20 07 - SULFATES (SELENATES, TELLURATES)

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

07.BB -With medium-sized cations

07.BB.20 Dolerophanite Cu2(SO4)O C 2/m 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 - 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
15 - WWW-MINCRYST

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

Dolerophanite

Cu2(SO4)O
Dana No: 30.02.02.01 Strunz No: 07.BB.20
Locality:

Notes: