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Phoenicochroite

A valid IMA mineral species - grandfathered
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About PhoenicochroiteHide

Formula:
Pb2(CrO4)O
Colour:
Dark red, bright red
Lustre:
Adamantine, Resinous
Hardness:
2½ - 3½
Specific Gravity:
7.01
Crystal System:
Monoclinic
Name:
From the Greek φοίυικος for "deep red" and χρόα for "colour," in allusion to its colour.
Isostructural with:
This page provides mineralogical data about Phoenicochroite.


Unique IdentifiersHide

Mindat ID:
3194
Long-form identifier:
mindat:1:1:3194:9
GUID
(UUID V4):
df91e484-1c37-4f64-a8d6-ad9ee888110a

Classification of PhoenicochroiteHide

Approved, 'Grandfathered' (first described prior to 1959)
Approval year:
1980
7.FB.05

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
B : With additional O,V, S, Cl
Dana 7th ed.:
35.1.2.1
35.1.2.1

35 : ANHYDROUS CHROMATES
1 : A2XO4
27.2.6

27 : Sulphites, Chromates, Molybdates and Tungstates
2 : Chromates

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
PhcIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of PhoenicochroiteHide

Adamantine, Resinous
Transparency:
Translucent
Comment:
Glimmering
Colour:
Dark red, bright red
Comment:
Turns lemon-yellow on exposure.
Streak:
Brick-red to yellowish orange
Hardness:
2½ - 3½ on Mohs scale
Tenacity:
Sectile
Cleavage:
Perfect
Perfect on {201}; poor on {001}, {010}, {011}.
Density:
7.01 g/cm3 (Measured)    7.075 g/cm3 (Calculated)

Optical Data of PhoenicochroiteHide

Type:
Biaxial (+)
RI values:
nα = 2.340 - 2.380 nβ = 2.380 - 2.440 nγ = 2.650
2V:
Measured: 58° , Calculated: 60°
Max Birefringence:
δ = 0.310
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v, moderately strong to strong
Optical Extinction:
X = b; Y ∧ c = –2°; Z ∧ c = 88°.
Pleochroism:
Weak
Comments:
Absorption: X < Y < Z.

Chemical Properties of PhoenicochroiteHide

Formula:
Pb2(CrO4)O
IMA Formula:
Pb2O(CrO4)

Crystallography of PhoenicochroiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 14.001(7) Å, b = 5.675(3) Å, c = 7.137(5) Å
β = 115.22°
Ratio:
a:b:c = 2.467 : 1 : 1.258
Unit Cell V:
513.02 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals tabular and imperfect, often reticularly intergrown. Massive; thin coatings.

Tabular on {100} or {201}, elongated along [010] or [001], showing {010}, {100}, {110}, {201}, {211}, {310}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000204PhoenicochroiteWilliams S A, McLean W J, Anthony J W (1970) A study of phoenicochroite - its structure and properties American Mineralogist 55 784-79219700293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.39 Å(100)
2.989 Å(100)
3.60 Å(70)
6.40 Å(40)
3.26 Å(40)
4.42 Å(30)
2.840 Å(30)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
45b : [Other oxidized fumarolic minerals]
47h : [Near-surface oxidized, dehydrated minerals]

Type Occurrence of PhoenicochroiteHide

Associated Minerals at Type Locality:
Reference:
Glocker E F (1839) 19. Phönikechroit. in Grundrib der Mineralogie, mit Einschlub der Geognosie und Petrefactenkunde, Schrag (Nurnberg) 612-612

Synonyms of PhoenicochroiteHide

Other Language Names for PhoenicochroiteHide

Varieties of PhoenicochroiteHide

BerezoviteDiscredited - shown to be altered phoenicochroite by S.A. Williams (1974).

Common AssociatesHide

CalciteCaCO3
CerussitePbCO3
CrocoitePbCr6+O4
FluoriteCaF2
FornacitePb2Cu(CrO4)(AsO4)(OH)
GalenaPbS
HemihedritePb10Zn(CrO4)6(SiO4)2(OH)2
IranitePb10Cu(CrO4)6(SiO4)2(OH)2
LeadhillitePb4(CO3)2(SO4)(OH)2
MimetitePb5(AsO4)3Cl
PyromorphitePb5(PO4)3Cl
QuartzSiO2
VauquelinitePb2Cu(CrO4)(PO4)(OH)
Associated Minerals Based on Photo Data:
33 photos of Phoenicochroite associated with HemihedritePb10Zn(CrO4)6(SiO4)2(OH)2
27 photos of Phoenicochroite associated with SchwartzembergitePb5H2(IO2)O4Cl3
25 photos of Phoenicochroite associated with WulfenitePb(MoO4)
14 photos of Phoenicochroite associated with MimetitePb5(AsO4)3Cl
14 photos of Phoenicochroite associated with PyromorphitePb5(PO4)3Cl
14 photos of Phoenicochroite associated with SeeligeritePb3(IO3)OCl3
9 photos of Phoenicochroite associated with IranitePb10Cu(CrO4)6(SiO4)2(OH)2
8 photos of Phoenicochroite associated with CrocoitePbCr6+O4
6 photos of Phoenicochroite associated with WickenburgiteCaPb3Al2Si10O24(OH)6
5 photos of Phoenicochroite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

7.FB.05GeorgerobinsonitePb4(CrO4)2(OH)2FClOrth. mmm (2/m 2/m 2/m) : Pmmn
7.FB.10SantanaitePb11(CrO4)O12Hex. 6 2 2 : P63 2 2
7.FB.15Wattersite[Hg2]2+2Hg2+[CrO4]O2Mon. 2/m : B2/b
7.FB.20Deanesmithite[Hg2]2+Hg2+3[CrO4]S2OTric. 1 : P1
7.FB.25EdoyleriteHg2+3(CrO4)S2Mon. 2/m : P21/b
7.FB.30ReynoldsitePb2Mn4+2O5(CrO4) Tric. 1 : P1

Other InformationHide

Notes:
Soluble in HCl with separation of lead chloride.
Health Risks:
Chromate minerals contain the carcinogenic and mutagenic chromate ion. Always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest. Do not pour chromate-containing solutions down the drain.

Internet Links for PhoenicochroiteHide

References for PhoenicochroiteHide

Reference List:

Localities for PhoenicochroiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Austria
 
  • Tyrol
    • Kufstein District
      • Brixlegg
Chile
 
  • Antofagasta
    • Antofagasta Province
      • Cerro Palestina
        • Estación Cerro Negro
          • Magallanes district
      • Sierra Gorda
        • Caracoles mining district
          • Caracoles
    • Tocopilla Province
      • Caracoles
      • Tocopilla
  • Atacama
    • Chañaral Province
      • Mantos de Oro mining district
  • Coquimbo
    • Elqui Province
      • Andacollo
Germany
 
  • Saxony
    • Zwickau District
      • Callenberg
Iran
 
  • Isfahan Province
    • Nain County
      • Anarak District
  • South Khorasan Province
    • Tabas County
      • Deyhuk District
        • Nayband (Neyband)
Italy
 
  • Campania
    • Naples
      • Somma-Vesuvius Complex
        • Ottaviano
Namibia
 
  • Erongo Region
    • Arandis Constituency
Russia (TL)
 
  • Sverdlovsk Oblast
    • Beryozovsky
South Africa
 
  • Mpumalanga
    • Nkangala District Municipality
      • Victor Khanye Local Municipality
        • Delmas
            • Dwarsfontein Farm
              • Transvaal Mine
UK
 
  • Scotland
    • South Lanarkshire
      • Leadhills
        • Wanlock Dod
USA
 
  • Arizona
    • Gila County
      • Banner Mining District
        • Christmas
    • Maricopa County
      • Belmont Mountains
      • Gillespie
        • Black Butte
      • Osborn Mining District
        • Hummingbird Springs
        • Tonopah
          • Belmont Mountain
          • Tiger Wash
      • Vulture Mining District
        • Vulture
      • Wickenburg
    • Pinal County
      • Tortilla Mountains
        • Ripsey Mining District
          • Ripsey Hill area
    • Yavapai County
  • California
    • San Bernardino County
      • Silver Lake Mining District
        • Soda Mountains
          • Baker
            • Otto Mountain
  • Nevada
    • Clark County
      • Eldorado Mountains
        • Eldorado Mining District (Colorado Mining District)
    • Esmeralda County
    • Lander County
 
Mineral and/or Locality  
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