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Miyahisaite

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Formula:
(Sr,Ca)2Ba3(PO4)3F
System:
Hexagonal
Colour:
Colorless
Lustre:
Vitreous
Hardness:
5
Name:
For Professor Michitoshi Miyahisa (1928-1983) for his work on deposits on Kyushu.
Isostructural with:
Hedyphane
A mineral of the hedyphane group in the apatite supergroup.


Classification of Miyahisaite

IMA status:
Approved
Approval Year:
2011
Nickel-Strunz 10th (pending) ed.:
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
Dana 8th ed.:
41.8.11.

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
8 : A5(XO4)3Zq

Physical Properties of Miyahisaite

Lustre:
Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colorless
Streak:
white
Hardness (Mohs):
5
Density:
4.511 g/cm3 (Calculated)

Chemical Properties of Miyahisaite

Formula:
(Sr,Ca)2Ba3(PO4)3F
IMA Formula:
(Sr,Ca)2Ba3(PO4)3F
Elements listed in formula:
Ba, Ca, F, O, P, Sr - search for minerals with similar chemistry
Analytical Data:
From type description
SrO (23.25)
BaO (51.62)
P2O5 (23.89)
F (2.13) 
F = O (-0.90)
Total 100.00 wt%

Crystallography of Miyahisaite

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Space Group Setting:
P63/m
Cell Parameters:
a = 9.921(2) Å, c = 7.469(3) Å
Ratio:
a:c = 1 : 0.753
Unit Cell Volume:
V 636.7 ų
Z:
2
Morphology:
As pseudomorphic aggregates
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.427(16)
3.248(22)
2.981(100)
2.865(21)
1.976(23)
1.874(16)
1.870(15)
1.864(17)

Type Occurrence of Miyahisaite

Type Locality:
Shimoharai mine, Saiki City, Oita Prefecture, Kyushu Region, Japan
General Appearance of Type Material:
As a pseudomorphic aggregate (up to about 100 μm in size)along with fluorapatite in the quartz matrix in a namansilite-rich layer of the chert.
Place of Conservation of Type Material:
National Museum of Nature and Science,Tokyo, Japan, specimen number NSM M-41299
Geological Setting of Type Material:
Low grade metamorphism of manganese deposits formed in chert.
Empirical Formula:
(Sr1.366Ca0.717)Σ2.083Ba2.911P3.002O12(F0.898OH0.088Cl0.014)Σ1.00
Associated Minerals at Type Locality:
QuartzFluorapatite

Relationship of Miyahisaite to other Species

Member of:
Hedyphane Group > Apatite Supergroup
Other Members of Group:
AiolositeNa4Bi(SO4)3Cl
CaracoliteNa3Pb2(SO4)3Cl
CesaniteNa3Ca2(SO4)3(OH)
FluorphosphohedyphaneCa2Pb3(PO4)3F
HedyphaneCa2Pb3(AsO4)3Cl
MorelanditeCa2Ba3(AsO4)3Cl
PhosphohedyphaneCa2Pb3(PO4)3Cl
Related Minerals - Nickel-Strunz Grouping):
8.BN.05AlforsiteBa5(PO4)3Cl
8.BN.05Belovite-(Ce)NaCeSr3(PO4)3F
8.BN.05Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)
8.BN.05Carbonate-rich HydroxylapatiteCa5(PO4,CO3)3(OH,O)
8.BN.05ChlorapatiteCa5(PO4)3Cl
8.BN.05Mimetite-MPb5(AsO4)3Cl
8.BN.05Johnbaumite-MCa5(AsO4)3OH
8.BN.05FluorapatiteCa5(PO4)3F
8.BN.05HedyphaneCa2Pb3(AsO4)3Cl
8.BN.05HydroxylapatiteCa5(PO4)3(OH)
8.BN.05JohnbaumiteCa5(AsO4)3OH
8.BN.05MimetitePb5(AsO4)3Cl
8.BN.05MorelanditeCa2Ba3(AsO4)3Cl
8.BN.05PyromorphitePb5(PO4)3Cl
8.BN.05FluorstrophiteSrCaSr3(PO4)3F
8.BN.05SvabiteCa5(AsO4)3F
8.BN.05TurneaureiteCa5(AsO4)3Cl
8.BN.05VanadinitePb5(VO4)3Cl
8.BN.05Belovite-(La)NaLaSr3(PO4)3F
8.BN.05Deloneite(Na0.5REE0.25Ca0.25)(Ca0.75REE0.25)Sr1.5(CaNa0.25REE0.25)(PO4)3F0.5(OH)0.5
8.BN.05FluorcaphiteSrCaCa3(PO4)3F
8.BN.05Kuannersuite-(Ce)NaCeBa3(PO4)3F0.5Cl0.5
8.BN.05Hydroxylapatite-MCa5(PO4)3OH
8.BN.05PhosphohedyphaneCa2Pb3(PO4)3Cl
8.BN.05StronadelphiteSr5(PO4)3F
8.BN.05FluorphosphohedyphaneCa2Pb3(PO4)3F
8.BN.05Carlgieseckeite-(Nd)NaNdCa3(PO4)3F
8.BN.10ArctiteNa2Ca4(PO4)3F

Other Names for Miyahisaite

Synonyms:

IMA2011-043

Name in Other Languages:
Japanese:宮久石

Other Information

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 Miyahisaite

Reference List:
Nishio-Hamane, D., Ogoshi, Y. and Minakawa, T. (2012): Miyahisaite, (Sr,Ca)6Ba3(PO4)3F, a new mineral of the hedyphane group in the apatite supergroup from the Shimoharai mine, Oita Prefecture, Japan. Journal of Mineralogical and Petrological Sciences. 107: 121-126.

Internet Links for Miyahisaite

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https://www.mindat.org/min-42835.html
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    • Localities for Miyahisaite

    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.
    (TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
    Japan (TL)
     
    • Kyushu Region
      • Oita Prefecture
        • Saiki City
    		Nishio-Hamane D., Ohgoshi Y., Minakawa T. (2012) Miyahisaite, (Sr,Ca)2Ba3(PO4)3F, a new mineral of hedyphane group in apatite supergroup from Shimoharai mine, Oita Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 107,121-126
    Mineral and/or Locality  
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