Blossite Mineral Data

Blossite Mineral Data +

[Welcome] [Newest Minerals] [Gallery] [About Us] [How to Buy]
We are www.minernet.it, an Italian company which deals rare, unusual,
and showy mineral specimens. We specialise in minerals from Tsumeb,
Mont Saint Hilaire, Bolivia and Major Italian sites.

General Blossite Information

Chemical Formula:

Cu2V+++++2O7

Composition:

Molecular Weight = 340.97 gm

Vanadium 29.88 % V 53.34 % V₂O₅

Copper 37.27 % Cu 46.66 % CuO

Oxygen 32.85 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₂V⁵⁺₂O₇

Environment:

A very rare sublimate, probably formed between 100-200 deg C, from the outer sulfate zone of a fumarole in the crater of a basaltic composite volcano.

IMA Status:

Approved IMA 1986

Locality:

Summit crater of Izalco Volcano, San Salvador. Link to MinDat.org Location Data.

Name Origin:

Named for F. Donald Bloss, American mineralogist, Virginia Polytechnic Institute, Blacksburg, Virginia.

Synonym:

ICSD 1831

PDF 26-566

Search for Blossite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Blossite Crystallography

Axial Ratios:

a:b:c =2.4637:1:0.7681

Cell Dimensions:

a = 20.676, b = 8.392, c = 6.446, Z = 8; V = 1,118.46 Den(Calc)= 4.05

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: F dd2

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

By Intensity(I/I_o): 3.08(1), 3.26(1), 2.483(0.8),3.22(0.8), 1.712(0.7), 2.096(0.7), 2.102(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Robinson P D , Hughes J M , Malinconico M L , American Mineralogist , 72 (1987) p.397-400, Blossite, alpha-Cu2V2O7, a new fumarolic sublimate from Izalco volcano, El Salvador, - data obtained by personal communication, May 2003.

View Additional jPOWD Structure files for Blossite
[1] [2]

Physical Properties of Blossite

Color:

Black.

Density:

3.95 - 3.97, Average = 3.96

Diaphaniety:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Luster:

Metallic

Streak:

red brown

Optical Properties of Blossite

Optical Data:

NCalc= 2.06 - from Gladstone-Dale relationship (KC = 0.2607) where Ncalc=Dcalc*KC+1
NCalc= 2.03 - from Gladstone-Dale relationship (KC = 0.2607) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Moderate, gray to creamy gray-brown.

RL Bireflectance:

Weak to moderate, in shades of cream-white.

RL Color:

White, with red-brown internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Blossite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
481 nm	14.60	15.30
547 nm	15.40	16.60
591 nm	14.80	16.70
644 nm	14.50	15.70

**Calculated Relative Intensity Colors of Blossite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%	600%
R₁
R₂

Calculated Properties of Blossite

Electron Density:

r_electron=3.80 gm/cc
note: r_Blossite=4.05 gm/cc.

Fermion Index

Fermion Index = 0.0009
Boson Index = 0.9991

Photoelectric:

PE_Blossite= 22.56 barns/electron
U=PE_Blossite x r_electron= 85.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Blossite is Not Radioactive

Blossite Classification

Dana Class:

38.5.6.1 (38)Anhydrous Phosphates, etc

(38.5)with miscellaneous formulae

(38.5.6)Dana Group

38.5.6.1 Blossite Cu2V2O7 F dd2 mm2

Strunz Class:

VII/A.20-20 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, waterfree divanadates [V2O7]4-

VII/A.20 - Ziesite - Chervetite series

VII/A.20-05 Petewilliamsite! (Ni,Co,Cu)30(As2O7)15 C 2 2

VII/A.20-10 Ziesite Cu2V2O7 A2/a 2/m

VII/A.20-20 Blossite Cu2V2O7 F dd2 mm2

VII/A.20-30 Chervetite Pb2V2O7 P 2₁/a 2/m

Other Blossite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.72,p397-400,1987) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Blossite :
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

Search for Blossite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Blossite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Blossite Mineral Data :

Ask about Blossite 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 Blossite Specimen Label here :

Blossite

Cu2V+++++2O7
Dana No: 38.5.6.1 Strunz No: VII/A.20-20
Locality:

Notes: