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Hydroxylapatite-M

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Formula:
Ca
 
5
(PO
 
4
)
 
3
OH
System:MonoclinicColour:White
Hardness:5
Dimorph of:Hydroxylapatite


Apatite Group. The monoclinic polymorph of hydroxylapatite.

Classification of Hydroxylapatite-M

IMA status:Discredited 2010
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 Hydroxylapatite-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 Hydroxylapatite-M

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

Crystallography of Hydroxylapatite-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)
1.784(70)

Optical Data of Hydroxylapatite-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 Hydroxylapatite-M

Formula:
Ca
 
5
(PO
 
4
)
 
3
OH
Essential elements:Ca, H, O, P
All elements listed in formula:Ca, H, O, P

Relationship of Hydroxylapatite-M to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BN.05Alforsite
Ba
 
5
(PO
 
4
)
 
3
Cl
8.BN.05Belovite-(Ce)
NaCeSr
 
3
(PO
 
4
)
 
3
F
8.BN.05Carbonate-rich Fluorapatite
Ca
 
5
(PO
 
4
,CO
 
3
)
 
3
(F,O)
8.BN.05Carbonate-rich Hydroxylapatite
Ca
 
5
(PO
 
4
,CO
 
3
)
 
3
(OH,O)
8.BN.05Chlorapatite
Ca
 
5
(PO
 
4
)
 
3
Cl
8.BN.05Mimetite-M
Pb
 
5
(AsO
 
4
)
 
3
Cl
8.BN.05Johnbaumite-M
Ca
 
5
(AsO
 
4
)
 
3
OH
8.BN.05Fluorapatite
Ca
 
5
(PO
 
4
)
 
3
F
8.BN.05Hedyphane
Pb
 
3
Ca
 
2
(AsO
 
4
)
 
3
Cl
8.BN.05Hydroxylapatite
Ca
 
5
(PO
 
4
)
 
3
(OH)
8.BN.05Johnbaumite
Ca
 
5
(AsO
 
4
)
 
3
OH
8.BN.05Mimetite
Pb
 
5
(AsO
 
4
)
 
3
Cl
8.BN.05Morelandite
Ca
 
2
Ba
 
3
(AsO
 
4
)
 
3
Cl
8.BN.05Pyromorphite
Pb
 
5
(PO
 
4
)
 
3
Cl
8.BN.05Fluorstrophite
SrCaSr
 
3
(PO
 
4
)
 
3
F
8.BN.05Svabite
Ca
 
5
(AsO
 
4
)
 
3
F
8.BN.05Turneaureite
Ca
 
5
(AsO
 
4
)
 
3
Cl
8.BN.05Vanadinite
Pb
 
5
(VO
 
4
)
 
3
Cl
8.BN.05Belovite-(La)
NaLaSr
 
3
(PO
 
4
)
 
3
F
8.BN.05Deloneite
(Na
 
0.5
REE
 
0.25
Ca
 
0
 · 25)(Ca
 
0.75
REE
 
0.25
)Sr
 
1.5
(CaNa
 
0.25
REE
 
0.25
)(PO
 
4
)
 
3
F
 
0.5
(OH)
 
0.5
8.BN.05Fluorcaphite
SrCaCa
 
3
(PO
 
4
)
 
3
F
8.BN.05Kuannersuite-(Ce)
NaCeBa
 
3
(PO
 
4
)
 
3
F
 
0.5
Cl
 
0.5
8.BN.05Phosphohedyphane
Ca
 
2
Pb
 
3
(PO
 
4
)
 
3
Cl
8.BN.05Stronadelphite
Sr
 
5
(PO
 
4
)
 
3
F
8.BN.05Fluorphosphohedyphane
Ca
 
2
Pb
 
3
(PO
 
4
)
 
3
F
8.BN.10Arctite
Na
 
2
Ca
 
4
(PO
 
4
)
 
3
F

Other Names for Hydroxylapatite-M

Synonyms:
Apatite-(CaOH)-MClinohydroxylapatiteIMA2004-006
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 Hydroxylapatite-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

Eur. J. Mineral. Fast Track doi:10.1127/0935-1221/2010/0022-2022

Internet Links for Hydroxylapatite-M

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    • Localities for Hydroxylapatite-M

    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.
    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; 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
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