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Apatite-(CaOH)-M

Big Photo

Oksøyekollen (Oksøykollen; Oxøiekollen), Snarum, Modum, Buskerud, Norway
© aö 2008

Formula:
(Ca,Na)
 
3
Ca
 
2
[(OH,Cl)|(PO
 
4
,SO
 
4
)
 
3
]
System:MonoclinicColour:White
Hardness:5
Dimorph of:Apatite-(CaOH)


Apatite Group. The monoclinic polymorph of Apatite-(CaOH).

Classification of Apatite-(CaOH)-M

IMA status:Approved 2004
Strunz 8th edition ID:7/B.39-35
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 Apatite-(CaOH)-M

Type Locality:Unnamed prospect, Seagull Lake area, Nipigon, Thunder Bay District, Ontario, Canada
General Appearance of Type Material:masses of coalescent spherulites up to 30 μm in diameter
Geological Setting of type material:Altered leucogabbro making up an intrusive unit in the Mesoproterozoic Seagull pluton
Associated Minerals at type locality:
TitaniteRutilePrehniteHibschite

Physical Properties of Apatite-(CaOH)-M

Lustre:Earthy
Colour:White
Hardness (Mohs):5
Density (measured):3.07 g/cm3
Density (calculated):3.13 g/cm3

Crystallography of Apatite-(CaOH)-M

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Cell Parameters:a = 9.445Å, b = 18.853Å, c = 6.8783Å
β = 120°
Ratio:a:b:c = 0.501 : 1 : 0.365
Unit Cell Volume:V 1,060.70 ų (Calculated from Unit Cell)
Z:4
X-Ray Powder Diffraction:
d-spacingIntensity
2.817(66)
2.781(41)
2.724(79)
2.630(24)
2.267(100)
1.945(39)
1.841(58)

Optical Data of Apatite-(CaOH)-M

Type:Uniaxial
RI values: nα = 1.632 nγ = 1.649
Maximum Birefringence:δ = 0.017

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

Chemical Properties of Apatite-(CaOH)-M

Formula:
(Ca,Na)
 
3
Ca
 
2
[(OH,Cl)|(PO
 
4
,SO
 
4
)
 
3
]
All elements listed in formula:Ca, Cl, H, Na, O, P, S

Relationship of Apatite-(CaOH)-M to other Species

Member of Group:
Apatite Supergroup:
A
 
5
(XO
 
4
)
 
3
Z
 
q
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.05Phosphohedyphane
Pb
 
3
Ca
 
2
[Cl|(PO
 
4
)
 
3
]
8.BN.05IMA2008-009
Sr
 
5
(PO
 
4
)
 
3
F
8.BN.05IMA2008-068
Ca
 
2
Pb
 
3
(PO
 
4
)
 
3
F
8.BN.10Arctite
Na
 
2
Ca
 
4
(PO
 
4
)
 
3
F

Other Names for Apatite-(CaOH)-M

Synonyms:
ClinohydroxylapatiteIMA2004-006
Other Languages:
Russian:Апатит-(CaOH)-M

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 Apatite-(CaOH)-M

Reference List:Chakhmouradian, A. R. & Medici, L. (2006): "Clinohydroxylapatite: a new apatite-group mineral from northwest Ontario (Canada), and new data on the extent of Na-S substitution in natural apatites", European Journal of Mineralogy 18, 105-112

Internet Links for Apatite-(CaOH)-M

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    Localities for Apatite-(CaOH)-M

    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.
    (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.
    Canada
     
    • Ontario
      • Thunder Bay District
        • Nipigon
          • Seagull Lake area
    		Chakhmouradian, A. R. & Medici, L. (2006): "Clinohydroxylapatite: a new apatite-group mineral from northwest Ontario (Canada), and new data on the extent of Na-S substitution in natural apatites", European Journal of Mineralogy 18, 105-112
    Mineral and/or Locality
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