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Carbonate-rich Fluorapatite

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Big Photo

Levant Mine, Trewellard, St Just, St Just District, Cornwall, England, UK
© Ian Jones

Show Carbonate-rich Fluorapatite Photos (165)



Formula:
Ca
 
5
(PO
 
4
,CO
 
3
)
 
3
(F,O)
System:HexagonalColour:Colourless, yellow, ...
Hardness:5
Member of:Apatite Subgroup > Apatite Supergroup
Name:Named from the Greek word meaning "to deceive" and the CARBONATE- prefix in allusion to the presence of some carbonate substitution for phosphate.
A variety of Fluorapatite

Apatite Group.

A variety of fluorapatite with carbonate group (CO3) substituting for some of the phosphate (PO4) groups.

Classification of Carbonate-rich Fluorapatite

IMA status:Discredited 2008
Explanation of status:The original name "Carbonate-Fluorapatite" was discredited in 2008.
Strunz 8th edition ID:7/B.39-50
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
Dana 8th edition ID:41.8.1.4

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
8 : A5(XO4)3Zq
Hey's CIM Ref.:22.4.4

22 : Phosphates, Arsenates or Vanadates with other Anions
4 : Phosphates, arsenates or vanadates with carbonate
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Physical Properties of Carbonate-rich Fluorapatite

Colour:Colourless, yellow, orange, brown.
Hardness (Mohs):5

Crystallography of Carbonate-rich Fluorapatite

Crystal System:Hexagonal
Cell Parameters:a = 9.34Å, c = 6.88Å
Ratio:a:c = 1 : 0.737
Unit Cell Volume:V 519.77 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Carbonate-rich Fluorapatite

Type:Uniaxial (-)
RI values: nω = 1.679 nε = 1.616
Maximum Birefringence:δ = 0.063

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

Chemical Properties of Carbonate-rich Fluorapatite

Formula:
Ca
 
5
(PO
 
4
,CO
 
3
)
 
3
(F,O)
Essential elements:Ca, F, O, P
All elements listed in formula:C, Ca, F, O, P

Relationship of Carbonate-rich Fluorapatite to other Species

Member of:Apatite Subgroup > Apatite Supergroup
Other Members of Group:

- +
Carbonate-rich Hydroxylapatite
Ca
 
5
(PO
 
4
,CO
 
3
)
 
3
(OH,O)
Chlorapatite
Ca
 
5
(PO
 
4
)
 
3
Cl
Fluorapatite
Ca
 
5
(PO
 
4
)
 
3
F
Fluorstrophite
SrCaSr
 
3
(PO
 
4
)
 
3
F
Hydroxylapatite
Ca
 
5
(PO
 
4
)
 
3
(OH)
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 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.05Hydroxylapatite-M
Ca
 
5
(PO
 
4
)
 
3
OH
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
Related Minerals - Hey's Index Grouping:

- +
22.4.1Bradleyite
Na
 
3
Mg(CO
 
3
)(PO
 
4
)
22.4.2Kovdorskite
Mg
 
2
(PO
 
4
)(OH) · 3H
 
2
O
22.4.3Carbonate-rich Hydroxylapatite
Ca
 
5
(PO
 
4
,CO
 
3
)
 
3
(OH,O)
22.4.5Tyrolite
Ca
 
2
Cu
 
9
(AsO
 
4
)
 
4
(CO
 
3
)(OH)
 
4
 · 11-12H
 
2
O
22.4.6Heneuite
CaMg
 
5
(CO
 
3
)(PO
 
4
)
 
3
(OH)
22.4.7Girvasite
NaCa
 
2
Mg
 
3
(PO
 
4
)
 
2
(H
 
2
PO
 
4
)(CO
 
3
)(OH)
 
2
 · 4H
 
2
O
22.4.8Daqingshanite-(Ce)
(Sr,Ca,Ba)
 
3
(Ce,La)(CO
 
3
)
 
3-x
(PO
 
4
)(OH,F)
 
2x
22.4.9Gartrellite
Pb(Cu,Fe
3+
 
,Zn)
 
2
(AsO
 
4
,SO
 
4
)
 
2
 · 2(H
 
2
O,OH)
22.4.10Voggite
Na
 
2
Zr(PO
 
4
)(CO
 
3
)(OH) · 2H
 
2
O
22.4.11Bonshtedtite
Na
 
3
Fe
2+
 
(CO
 
3
)(PO
 
4
)

Other Names for Carbonate-rich Fluorapatite

Synonyms:
Carbonate-fluorapatiteCarbonate-rich Apatite-(CaF)Carbonatian Hydroxyl-fluorapatiteDehrniteLewistonite
Other Languages:
German:Dehrnit
Russian:Карбонатфторапатит
Simplified Chinese:碳氟磷灰石
Spanish:Dehrnita
Varieties:
FrancoliteHolmbushiteSoda-DehrniteStaffelite

Other Information

Other Information:Soluble in HCl or in HNO3. Varieties containing CO3 may dissolve with slight effervescence.
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 Carbonate-rich Fluorapatite

Reference List:

- +
Brooke and Henry (1850) London, Edinburgh and Dublin Philosophical Magazine and Journal of Science, London: 36: 134 (as Francolite).

Stein (1866) Jb. Min.: 716 (as Steffelite).

Larsen and Shannon (1930a) American Mineralogist: 15: 303 (as Dehrnite).

Larsen and Shannon (1930b) American Mineralogist: 15: 324 (as Dehrnite), 326 (as Lewistonite).

McConnell (1938) American Mineralogist: 23: 1 (as Dehrnite, Lewistonite).

Larsen (1942) American Mineralogist: 27: 297, 364 (as Dehrnite).

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 902-903 (as Dehrnite), 903-904 (as Lewistonite).

Dunn, P.J. (1978): Mineralogical Magazine, 42, 282 (discreditation Lewistonite ?).

Internet Links for Carbonate-rich Fluorapatite

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    • Localities for Carbonate-rich Fluorapatite

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