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Hydroxylapatite-M

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Formula:
Ca5(PO4)3OH
Colour:
White
Lustre:
Earthy
Hardness:
5
Specific Gravity:
3.07
Crystal System:
Monoclinic
Dimorph of:
Apatite Group. The monoclinic polymorph of hydroxylapatite.


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Classification of Hydroxylapatite-MHide

Discredited
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

Physical Properties of Hydroxylapatite-MHide

Earthy
Colour:
White
Hardness:
Density:
3.07 g/cm3 (Measured)    3.13 g/cm3 (Calculated)

Optical Data of Hydroxylapatite-MHide

Type:
Uniaxial
RI values:
nα = 1.632 nγ = 1.649
Max Birefringence:
δ = 0.017
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Hydroxylapatite-MHide

Formula:
Ca5(PO4)3OH

Crystallography of Hydroxylapatite-MHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 9.445 Å, b = 18.853 Å, c = 6.8783 Å
β = 120°
Ratio:
a:b:c = 0.501 : 1 : 0.365
Unit Cell V:
1,060.70 ų (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
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)

First Recorded Occurrence of Hydroxylapatite-MHide

General Appearance of First Recorded Material:
masses of coalescent spherulites up to 30 μm in diameter
Geological Setting of First Recorded Material:
Altered leucogabbro making up an intrusive unit in the Mesoproterozoic Seagull pluton
Associated Minerals at First Recorded Locality:

Synonyms of Hydroxylapatite-MHide

Other Language Names for Hydroxylapatite-MHide

Simplified Chinese:单斜羟磷灰石

Related Minerals - Nickel-Strunz GroupingHide

8.BN.05AlforsiteBa5(PO4)3ClHex. 6/m : P63/m
8.BN.05Belovite-(Ce)NaCeSr3(PO4)3FTrig. 3 : P3
8.BN.05Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)Hex.
8.BN.05Carbonate-rich HydroxylapatiteCa5(PO4,CO3)3(OH,O)Hex.
8.BN.05ChlorapatiteCa5(PO4)3ClHex. 6/m : P63/m
8.BN.05Mimetite-MPb5(AsO4)3ClMon. 2/m : P21/b
8.BN.05Johnbaumite-MCa5(AsO4)3OHMon. 2/m : P21/m
8.BN.05FluorapatiteCa5(PO4)3FHex. 6/m : P63/m
8.BN.05HedyphaneCa2Pb3(AsO4)3ClHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.BN.05HydroxylapatiteCa5(PO4)3(OH)Hex. 6/m : P63/m
8.BN.05JohnbaumiteCa5(AsO4)3OHHex. 6/m : P63/m
8.BN.05MimetitePb5(AsO4)3ClHex. 6/m : P63/m
8.BN.05MorelanditeCa2Ba3(AsO4)3Cl
8.BN.05PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
8.BN.05FluorstrophiteSrCaSr3(PO4)3FHex. 6/m : P63/m
8.BN.05SvabiteCa5(AsO4)3FHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.BN.05TurneaureiteCa5(AsO4)3ClHex.
8.BN.05VanadinitePb5(VO4)3ClHex. 6/m : P63/m
8.BN.05Belovite-(La)NaLaSr3(PO4)3FTrig. 3 : P3
8.BN.05Deloneite(Na0.5REE0.25Ca0.25)(Ca0.75REE0.25)Sr1.5(CaNa0.25REE0.25)(PO4)3F0.5(OH)0.5Trig.
8.BN.05FluorcaphiteSrCaCa3(PO4)3FHex. 6/m : P63/m
8.BN.05Kuannersuite-(Ce)NaCeBa3(PO4)3F0.5Cl0.5Trig. 3 : P3
8.BN.05PhosphohedyphaneCa2Pb3(PO4)3ClHex. 6/m : P63/m
8.BN.05StronadelphiteSr5(PO4)3FHex. 6/m : P63/m
8.BN.05FluorphosphohedyphaneCa2Pb3(PO4)3FHex. 6/m : P63/m
8.BN.05Carlgieseckeite-(Nd)NaNdCa3(PO4)3FTrig. 3 : P3
8.BN.05Miyahisaite(Sr,Ca)2Ba3(PO4)3F Hex. 6/m : P63/m
8.BN.10ArctiteNa2Ca4(PO4)3FTrig. 3m (3 2/m) : R3m

Other InformationHide

Health Risks:
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-MHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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
Pasero, M., Kampf, A. R., Ferraris, C., Pekov, I. V., Rakovan, J. and White, T. J. (2010): Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy 22, 163-179.

Internet Links for Hydroxylapatite-MHide

Localities for Hydroxylapatite-MHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada (FRL)
 
  • Ontario
    • Thunder Bay District
      • 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
Mineral and/or Locality  
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