Phoenicochroite Mineral Data

Phoenicochroite Mineral Data
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General Phoenicochroite Information

Help on Chemical Formula: Chemical Formula: Pb2(CrO4)O
Help on Composition: Composition: Molecular Weight = 546.39 gm
   Chromium   9.52 %  Cr   12.44 % CrO
   Lead      75.84 %  Pb   81.70 % PbO
   Oxygen    14.64 %  O
            ______        ______ 
            100.00 %       94.14 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2CrO5
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1839
Help on Locality: Locality: Beresov, Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for "deep red" and "color", in allusion to the color
Help on Name Pronunciation: Name Pronunciation: Phoenicochroite + Pronunciation Say PHOENICOCHROITE
Help on Synonym: Synonym: ICSD 34831
  PDF 29-769
 

Phoenicochroite Image

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Phoenicochroite

Comments: Deep red phoenicochroite with crocoite in matrix.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Picture size 6.5 mm.
© Thomas Witzke / Abraxas-Verlag
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Phoenicochroite   Hemihedrite

Comments: Yellow hemihedrite crystals to 1 mm within pockets of dark red phoenicochroite crystalline aggregates on matrix.
Location: Pack Rat claim, Maricopa Co., Arizona, USA. Scale: Picture size 1.5 cm.
© Tom Loomis / Dakota Matrix

Phoenicochroite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =2.4671:1:1.2576
Help on Cell Dimensions: Cell Dimensions: a = 14.001, b = 5.675, c = 7.137, Z = 4; beta = 115.217° V = 513.03 Den(Calc)= 7.07
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.979(1), 3.38(1), 6.43(0.5),
Click Here for Large Phoenicochroite Structure Window Crystal Structure:

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Williams S A , McLean W J , Anthony J W , American Mineralogist , 55 (1970) p.784-792, A study of phoenicochroite - its structure and properties

 

Physical Properties of Phoenicochroite

Help on Cleavage: Cleavage: {201} Perfect
Help on Color: Color: Dark red, Lemon yellow.
Help on Density: Density: 7.01
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Adamantine - Resinous
Help on Streak: Streak: yellow orange
 

Optical Properties of Phoenicochroite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.589 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.575 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2107,KPDmeas= 0.2126,KC= 0.1338
Ncalc = 1.94 - 1.95
Help on Optical Data: Optical Data: Biaxial (+), a=2.38, b=2.44, g=2.65, bire=0.2700, 2V(Calc)=62, 2V(Meas)=58. Dispersion r > v strong.
 

Calculated Properties of Phoenicochroite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.90 gm/cc
note: Specific Gravity of Phoenicochroite =7.07 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.17
Boson Index = 0.83
Help on Photoelectric: Photoelectric: PEPhoenicochroite =1,397.54 barns/electron
U=PEPhoenicochroite x rElectron Density=8,246.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Phoenicochroite is Not Radioactive
 

Phoenicochroite Classification
Help on Dana Class: Dana Class: 35.01.02.01 (35)Anhydrous Chromates
  (35.01)where (A+)2 XO4
  (35.01.02)Dana Group
 
35.01.02.01 Phoenicochroite Pb2(CrO4)O C 2/m 2/m
Help on Strunz Class: Strunz Class: 07.FB.05 07 - SULFATES (SELENATES, TELLURATES)
  07.F - Chromates
  07.FB -With additional O, V, S, Cl
 
07.FB.05 Phoenicochroite Pb2(CrO4)O C 2/m 2/m
 

Other Phoenicochroite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Phoenicochroite :
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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Phoenicochroite

Pb2(CrO4)O
Dana No: 35.01.02.01 Strunz No: 07.FB.05
Locality:

 

Notes: