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Phosphohedyphane

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Betpakdala Desert (Bet-Pak-Dal Desert), Qaraghandy Oblysy (Karaganda Oblast'), Kazakhstan
© Knut Eldjarn

Show Phosphohedyphane Photos (9)
Formula:
Pb
 
3
Ca
 
2
[Cl|(PO
 
4
)
 
3
]
System:HexagonalColour:Colourless
Hardness:4
Name:For its phosphate content and relationship with Hedyphane.


Apatite Supergroup. Svabite Subgroup. The phosphate analogue of Hedyphane. The Pb3Ca2 analogue of Chlorapatite.

Specimens from numerous localities worldwide have previously been labelled "Calcian pyromorphite", and some of them may be identical with this species.

Classification of Phosphohedyphane

IMA status:Approved 2005
Strunz 8th edition ID:7/B.39-135
Nickel-Strunz 10th (pending) edition ID:8.BN.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
N : With only large cations, (OH, etc.):RO4 = 0.33:1
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Type Occurrence of Phosphohedyphane

Type Locality:Capitana Mine, Copiapó Province, Atacama Region, Chile
General Appearance of Type Material:Transparent, colourless, tapering hexagonal prisms, as individuals up to about 0.5 mm in length and 0.1 mm in diameter, commonly doubly terminated; often in subparallel intergrowths and irregular clusters
Place of Conservation of Type Material:Natural History Museum of Los Angeles County
Geological Setting of type material:Secondary mineral in the oxidized zone of a Cu-Pb-Ag deposit
Associated Minerals at type locality:
QuartzDuftiteBayldonite

Physical Properties of Phosphohedyphane

Lustre:Vitreous, Greasy
Diaphaneity (Transparency):Transparent
Colour:Colourless
Streak:White
Hardness (Mohs):4
Hardness Data:Measured
Tenacity:Brittle
Cleavage:None Observed
Fracture:Sub-Conchoidal
Density (calculated):5.92 g/cm3

Crystallography of Phosphohedyphane

Crystal System:Hexagonal
Class (H-M):6/m - Dipyramidal
Space Group:P63/m
Cell Parameters:a = 9.857Å, c = 7.13Å
Ratio:a:c = 1 : 0.723
Unit Cell Volume:V 599.9 ų
Z:2
Morphology:Forms observed are {100} and {101} good, {411} poor, and {10.0.1} and {20.0.1} (approx.)
X-Ray Powder Diffraction:
d-spacingIntensity
8.538 (20)
4.054 (60)
3.565 (30)
2.942 (100)
2.882 (30)
2.139 (35)
1.918 (25)

Optical Data of Phosphohedyphane

Type:Uniaxial (-)
RI values: nα = 1.935 nε = 1.928
Maximum Birefringence:δ = 1.935

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Phosphohedyphane

Formula:
Pb
 
3
Ca
 
2
[Cl|(PO
 
4
)
 
3
]
All elements listed in formula:Ca, Cl, O, P, Pb
Analyical Data:Results from electron microprobe analyses of crystal cores and rims. The mineral shows a distinct chemical zonation. From type description.
          Cores    Rims

CaO       (9.24)   (7.76)
PbO      (67.60)  (69.35)
P2O5     (18.40)  (17.00)
As2O5     (2.73)   (3.68)
Cl        (3.32)   (3.22)
–O = Cl  (–0.75)  (–0.73)

sums     100.54   100.28 wt.-%

Relationship of Phosphohedyphane to other Species

Related to:
  • Apatite Supergroup
  • Svabite Subgroup
    • Related Minerals - Nickel-Strunz Grouping):

    - +
    8.BN.05Alforsite
    Ba
     
    5
    		[Cl|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Belovite-(Ce)
    NaSr
     
    3
    		(Ce,La)[(F,OH)|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Carbonate-rich Apatite-(CaF)
    Ca
     
    5
    		[(F,O)|(PO
     
    4
    		,CO
     
    3
    		)
     
    3
    		]
    8.BN.05Carbonate-rich Apatite-(CaOH)
    Ca
     
    5
    		[(OH,O)|(PO
     
    4
    		,CO
     
    3
    		)
     
    3
    		]
    8.BN.05Apatite-(CaCl)
    Ca
     
    5
    		[Cl|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Clinomimetite
    Pb
     
    5
    		[Cl|(AsO
     
    4
    		)
     
    3
    		]
    8.BN.05Fermorite
    (Ca,Sr)
     
    5
    		(AsO
     
    4
    		,PO
     
    4
    		)
     
    3
    		(OH)
    8.BN.05Apatite-(CaF)
    Ca
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Hedyphane
    Pb
     
    3
    		Ca
     
    2
    		[Cl|(AsO
     
    4
    		)
     
    3
    		]
    8.BN.05Apatite-(CaOH)
    Ca
     
    5
    		[OH|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Johnbaumite
    Ca
     
    5
    		[OH|(AsO
     
    4
    		)
     
    3
    		]
    8.BN.05Mimetite
    Pb
     
    5
    		[Cl|(AsO
     
    4
    		)
     
    3
    		]
    8.BN.05Morelandite
    (Ba,Ca,Pb)
     
    5
    		[Cl|(AsO
     
    4
    		,PO
     
    4
    		)
     
    3
    		]
    8.BN.05Pyromorphite
    Pb
     
    5
    		[Cl|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Apatite-(SrOH)
    (Sr,Ca)
     
    5
    		(PO
     
    4
    		)
     
    3
    		(OH,F)
    8.BN.05Svabite
    Ca
     
    5
    		[(F,Cl,OH)|(AsO
     
    4
    		)
     
    3
    		]
    8.BN.05Turneaureite
    Ca
     
    5
    		[Cl|(AsO
     
    4
    		,PO
     
    4
    		)
     
    3
    		]
    8.BN.05Vanadinite
    Pb
     
    5
    		[Cl|(VO
     
    4
    		)
     
    3
    		]
    8.BN.05Belovite-(La)
    NaSr
     
    3
    		(La,Ce)[(F,OH)|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Deloneite-(Ce)
    NaCa
     
    2
    		SrCe(PO
     
    4
    		)
     
    3
    		F
    8.BN.05Fluorcaphite
    (Ca,Sr,Ce,Na)
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Kuannersuite-(Ce)
    NaBa
     
    3
    		(Ce,Nd,La)[(F,Cl)|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Apatite-(CaOH)-M
    (Ca,Na)
     
    3
    		Ca
     
    2
    		[(OH,Cl)|(PO
     
    4
    		,SO
     
    4
    		)
     
    3
    		]
    8.BN.05IMA2008-009
    Sr
     
    5
    		(PO
     
    4
    		)
     
    3
    		F
    8.BN.10Arctite
    Na
     
    2
    		Ca
     
    4
    		(PO
     
    4
    		)
     
    3
    		F

    Other Names for Phosphohedyphane

    Synonyms:
    IMA2005-026Polysphaerite
    Other Languages:
    German:Phosphohedyphan

    Other Information

    Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

    References for Phosphohedyphane

    Reference List:Kampf, A.R., I.M. Steele, and R.A. Jenkins (2006): "Phosphohedyphane, the phosphate analog of hedyphane: Description and crystal structure": Am. Mineral. 91: 1909-1917.

    Articles/Blogs about Phosphohedyphane

    Internet Links for Phosphohedyphane

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  • Raman and XRD data at RRUFF project
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    Localities for Phosphohedyphane

    Hide Locality List
    The 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.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • New South Wales
      • Yancowinna Co.
    		Am.Min. 91, 1909-1917(2006)
    • Northern Territory
      • Tennant Inlier
    		Am.Min. 91, 1909-1917(2006)
    • Victoria
      • Lilydale
    		Birch, W. D. & Mills, S. J. (2007) Sulphide–carbonate reaction in recrystallised limestone at Lilydale, Victoria, Australia: a new occurrence of phosphohedyphane, Australian Journal of Mineralogy, 13(2), 73–82.
    Chile
     
    • Atacama Region
      • Copiapó Province
    		Am.Min. 91, 1909-1917(2006)
    France
     
    • Rhône-Alpes
      • Rhône
        • Beaujeu
          • Chenelette
    		Am.Min. 91, 1909-1917(2006)
    Kazakhstan
     
    • Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast')
    		Pavel M. Kartashov data
    Russia
     
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Ekaterinburg (Sverdlovsk)
            • Berezovskii (Berezovskii Zavod)
    		Am.Min. 91, 1909-1917(2006)
    UK
     
    • England
      • Cornwall
        • Liskeard District
          • Menheniot Area
            • Menheniot
    		Tony Aldworth Collection/Chris Jewson Collection
    USA
     
    • Arizona
      • Maricopa Co.
        • Big Horn Mts
          • Osborn District
            • Tonopah
              • Belmont Mountain
    		Am.Min. 91, 1909-1917(2006)
      • Pinal Co.
        • Mammoth District
          • Tiger
            • St. Anthony deposit
    		Am.Min. 91, 1909-1917(2006)
      • Santa Cruz Co.
        • Patagonia Mts
          • Harshaw District
            • Harshaw
              • Hardshell Gulch
    		Am.Min. 91, 1909-1917(2006)
    • Nevada
      • Clark Co.
        • Goodsprings District
    		Am.Min. 91, 1909-1917(2006)
    Am.Min. 91, 1909-1917(2006)
    Am.Min. 91, 1909-1917(2006)
    Am.Min. 91, 1909-1917(2006)
    Rocks & Minerals 83:1 pp 65-69
      • Humboldt Co.
        • Iron Point District
          • Valmy
    		Am.Min. 91, 1909-1917(2006)
    Mineral and/or Locality
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