Whitlockite
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Whitlockite
Formula:
Ca9Mg(PO4)6(PO3OH)
The IMA formula for whitlockite originally showed the monofluorophosphate (PO3F)2- ion rather than hydroxylated phosphate (PO3OH)2- ion. The latter anionic group is correct; the former, attributed to the now-discredited whitlockite group mineral bobdownsite, was determined to be an analytical error (see McCubbin et al., 2018).
Colour:
Colourless, grey-white, light pink, light yellow; colourless in transmitted light.
Lustre:
Vitreous, Resinous
Hardness:
5
Specific Gravity:
3.12
Crystal System:
Trigonal
Member of:
Name:
Named after Herbert Percy Whitlock (31 July 1868, New York City, New York, USA - 22 February 1948), Curator of Minerals, American Museum of Natural History, New York (USA).
Whitlockite Group.
Structurally related to wopmayite.
All non-terrestrial whitlockites are actually merrillite (Dowty, 1977).
Visit gemdat.org for gemological information about Whitlockite.
Structurally related to wopmayite.
All non-terrestrial whitlockites are actually merrillite (Dowty, 1977).
Visit gemdat.org for gemological information about Whitlockite.Unique Identifiers
Mindat ID:
4280
Long-form identifier:
mindat:1:1:4280:8
IMA Classification of Whitlockite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ca9Mg(PO4)6(PO3F)
First published:
1941
Classification of Whitlockite
8.AC.45
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
38.3.4.1
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
3 : (AB)3(XO4)2
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
3 : (AB)3(XO4)2
19.4.8
19 : Phosphates
4 : Phosphates of Ca
19 : Phosphates
4 : Phosphates of Ca
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Wht | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Wht | Whitney & Evans (2010) | Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371 |
Physical Properties of Whitlockite
Vitreous, Resinous
Transparency:
Transparent, Translucent
Colour:
Colourless, grey-white, light pink, light yellow; colourless in transmitted light.
Streak:
White
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
3.12 g/cm3 (Measured) 3.102 g/cm3 (Calculated)
Optical Data of Whitlockite
Type:
Uniaxial (-)
RI values:
nω = 1.629 nε = 1.626
Max. Birefringence:
δ = 0.003
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Chemistry of Whitlockite
Mindat Formula:
Ca9Mg(PO4)6(PO3OH)
The IMA formula for whitlockite originally showed the monofluorophosphate (PO3F)2- ion rather than hydroxylated phosphate (PO3OH)2- ion. The latter anionic group is correct; the former, attributed to the now-discredited whitlockite group mineral bobdownsite, was determined to be an analytical error (see McCubbin et al., 2018).
The IMA formula for whitlockite originally showed the monofluorophosphate (PO3F)2- ion rather than hydroxylated phosphate (PO3OH)2- ion. The latter anionic group is correct; the former, attributed to the now-discredited whitlockite group mineral bobdownsite, was determined to be an analytical error (see McCubbin et al., 2018).
Element Weights:
Crystallography of Whitlockite
Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3c
Cell Parameters:
a = 10.33 Å, c = 37.103(5) Å
Ratio:
a:c = 1 : 3.592
Unit Cell V:
3,428.79 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Crystals exhibit rhombohedral development; rarely tabular {0001}. Coarse-granular to earthy. Cave pearls.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018920 | Whitlockite | Tait K T, Barkley M C, Thompson R M, Origlieri M J, Evans S H, Prewitt C T, Yang H (2011) Bobdownsite, a new mineral species from Big Fish River, Yukon, Canada, and its structural relationship with whitlockite-type compounds The Canadian Mineralogist 49 1065-1078 | 2011 | Palermo #1 quarry, New Hampshire, USA | 0 | 293 | |
| 0004625 | Whitlockite | Hughes J M, Jolliff B L, Rakovan J (2008) The crystal chemistry of whitlockite and merrillite and the dehydrogenation of whitlockite to merrillite American Mineralogist 93 1300-1305 | ![]() | 2008 | synthetic | 0 | 293 |
| 0004624 | Whitlockite | Hughes J M, Jolliff B L, Rakovan J (2008) The crystal chemistry of whitlockite and merrillite and the dehydrogenation of whitlockite to merrillite American Mineralogist 93 1300-1305 | ![]() | 2008 | synthetic | 0 | 293 |
| 0004623 | Whitlockite | Hughes J M, Jolliff B L, Rakovan J (2008) The crystal chemistry of whitlockite and merrillite and the dehydrogenation of whitlockite to merrillite American Mineralogist 93 1300-1305 | ![]() | 2008 | Tip Top Pegmatite, Custer County, South Dakota | 0 | 293 |
| 0004622 | Whitlockite | Hughes J M, Jolliff B L, Rakovan J (2008) The crystal chemistry of whitlockite and merrillite and the dehydrogenation of whitlockite to merrillite American Mineralogist 93 1300-1305 | ![]() | 2008 | Palermo Mine, North Groton, Grafton County, New Hampshire | 0 | 293 |
| 0010333 | Whitlockite | Tsirlin A A, Dikarev E V, Shpanchenko R V, Antipov E V (2006) A new whitlockite, Ca8.42Na1.16V(PO4)7 Acta Crystallographica C62 i13-i15 | ![]() | 2006 | synthetic | 0 | 293 |
| 0013352 | Whitlockite | Schroeder L W, Dickens B, Brown W E (1977) Crystallographic studies of the role of Mg as a stabilizing impurity in beta-Ca3(PO4)2. II. Refinement of Mg-containing beta-Ca3(PO4)2 Journal of Solid State Chemistry 22 253-262 | 1977 | synthetic | 0 | 293 | |
| 0013351 | Whitlockite | Schroeder L W, Dickens B, Brown W E (1977) Crystallographic studies of the role of Mg as a stabilizing impurity in beta-Ca3(PO4)2. II. Refinement of Mg-containing beta-Ca3(PO4)2 Journal of Solid State Chemistry 22 253-262 | 1977 | synthetic | 0 | 293 | |
| 0009550 | Whitlockite | Kostiner E, Rea J R (1976) The crystal structure of manganese-whitlockite, Ca18Mn2H2(PO4)14 Acta Crystallographica B32 250-253 | ![]() | 1976 | synthetic | 0 | 293 |
| 0012160 | Whitlockite | Gopal R, Calvo C, Ito J, Sabine W K (1974) Crystal structure of synthetic Mg-whitlockite, Ca18Mg2H2(PO4)14 Canadian Journal of Chemistry 52 1155-1164 | 1974 | synthetic | 0 | 293 | |
| 0014686 | Whitlockite | Gopal R, Calvo C (1972) Structural relationship of whitlockite and beta-Ca3(PO4)2 Nature Physical Science 237 30-32 | 1972 | Palermo Quarry | 0 | 293 | |
| 0014685 | Whitlockite | Gopal R, Calvo C (1972) Structural relationship of whitlockite and beta-Ca3(PO4)2 Nature Physical Science 237 30-32 | 1972 | Palermo Quarry | 0 | 293 | |
| 0000445 | Whitlockite | Calvo C, Gopal R (1975) The crystal structure of whitlockite from the Palermo quarry American Mineralogist 60 120-133 | ![]() | 1975 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Loading XRD data...
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.88 Å | (100) |
| 3.21 Å | (90) |
| 2.60 Å | (90) |
| 5.24 Å | (80) |
| 3.47 Å | (70) |
| 1.72 Å | (70) |
| 1.93 Å | (60) |
| 6.55 Å | (50) |
| 1.88 Å | (50) |
| 1.55 Å | (50) |
Comments:
North Groton, New Hampshire, USA. Data from Frondel (1943).
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
| 6 : Secondary asteroid phases | 4.566-4.560 |
| Near-surface Processes | |
| 21 : Chemically precipitated carbonate, phosphate, iron formations | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 49 : Oxic cellular biomineralization (see also #44) | <0.54 |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 57 : Other minerals formed by human processes |
Geological Setting:
Pegmatites; phosphate-rock deposits.
Type Occurrence of Whitlockite
General Appearance of Type Material:
Occurs as coarse granular masses with small open cavities lined with crystals. The crystals range in size from about 1 mm to 1.5 cm along the c-axis with an embedded crystal measuring about 3 cm. The crystals usually are simple rhombohedra.
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, 95030; National Museum of Natural History, Washington, D.C., USA, 146196.
Geological Setting of Type Material:
Pegmatite
Associated Minerals at Type Locality:
Synonyms of Whitlockite
Other Language Names for Whitlockite
Varieties of Whitlockite
| Martinite (of Kloos) | A carbonate-bearing variety of whitlockite. |
| Zeugite | A carbonate-bearing Whitlockite. |
Relationship of Whitlockite to other Species
Member of:
Other Members of Whitlockite Subgroup:
| Hedegaardite | (Ca,Na)9(Ca,Na)Mg(PO4)6(PO3OH) | Trig. 3m : R3c |
| Strontiowhitlockite | Sr9Mg(PO4)6(PO3OH) | Trig. 3m : R3c |
| Wopmayite | Ca6Na3◻Mn(PO4)3(PO3OH)4 | Trig. 3m : R3c |
Common Associates
Associations Based on Photo Data:
| 51 photos of Whitlockite associated with Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
| 27 photos of Whitlockite associated with Robertsite | Ca2Mn3+3(PO4)3O2 · 3H2O |
| 15 photos of Whitlockite associated with Hydroxylapatite | Ca5(PO4)3(OH) |
| 13 photos of Whitlockite associated with Kulanite | Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3 |
| 12 photos of Whitlockite associated with Gormanite | (Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O |
| 12 photos of Whitlockite associated with Mitridatite | Ca2Fe3+3(PO4)3O2 · 3H2O |
| 11 photos of Whitlockite associated with Quartz | SiO2 |
| 8 photos of Whitlockite associated with Albite | Na(AlSi3O8) |
| 8 photos of Whitlockite associated with Laueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O |
| 8 photos of Whitlockite associated with Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 8.AC. | 'Crocobelonite-1M' | CaFe3+2O(PO4)2 |
| 8.AC. | Magnesioqingheiite | Na2Mg(MgAl)(PO4)3 |
| 8.AC. | Manganobadalovite | NaNaMn(MgFe3+)(AsO4)3 |
| 8.AC. | Changesite-(Y) | (Ca8Y)◻Fe2+(PO4)7 |
| 8.AC. | Babunaite-(Nd) | NdAsO4 |
| 8.AC. | Crocobelonite | CaFe3+2O(PO4)2 |
| 8.AC. | Wopmayite | Ca6Na3◻Mn(PO4)3(PO3OH)4 |
| 8.AC. | Beershevaite | CaFe3+3(PO4)3O |
| 8.AC. | Epiebnerite | (NH4)Zn(PO4) |
| 8.AC. | Ebnerite | (NH4)Zn(PO4) |
| 8.AC.X | Dyrnaesite-(La) | Na8Ce4+(La,REE)2(PO4)6 |
| 8.AC. | Edtollite | K2NaCu5Fe3+O2(AsO4)4 |
| 8.AC. | Angarfite | NaFe3+5(PO4)4(OH)4 · 4H2O |
| 8.AC. | Kabalovite | Fe2+3Fe3+4(PO4)6 |
| 8.AC. | Nazarchukite | Ca2NiFe3+2(PO4)4 |
| 8.AC. | Calciohatertite | NaNaCa(CaFe3+)(AsO4)3 |
| 8.AC. | Alumoedtollite | K2NaCu5AlO2(AsO4)4 |
| 8.AC.02 | Grigorievite | Cu3Fe3+2Al2(VO4)6 |
| 8.AC.02 | Koksharovite | CaMg2Fe3+4(VO4)6 |
| 8.AC.02 | Ziminaite | Fe3+ 6 (VO4)6 |
| 8.AC.05 | Hatertite | Na2(Ca,Na)(Fe3+,Cu)2(AsO4)3 |
| 8.AC.05 | Erikapohlite | Cu3(Zn,Cu,Mg)4Ca2(AsO4)6 · 2H2O |
| 8.AC.05 | 'Unnamed (Na-Mg Arsenate Hydroxyarsenate)' | NaMg3(AsO4)(AsO3OH)2 |
| 8.AC.05 | 'Unnamed (Na-Zn-H Arsenate Hydroxyarsenate)' | Na(Na0.6Zn0.4)Zn2(H0.6AsO4)(AsO3OH)2 |
| 8.AC.05 | Calciojohillerite | NaCaMg3(AsO4)3 |
| 8.AC.05 | Magnesiohatertite | (Na,Ca)2Ca(Mg,Fe3+)2(AsO4)3 |
| 8.AC.05 va | 'Alluaudite-Na[]' | ◻4Na4Mn2+4Fe3+8(PO4)12 |
| 8.AC.05 va | 'Alluaudite-Ca[]' | ◻4Ca4Mn2+4Fe3+8(PO4)12 |
| 8.AC.05 va | 'Ferroalluaudite-NaNa' | Na4Na4Fe2+4Fe3+8(PO4)12 |
| 8.AC.05 | 'Hagendorfite-NaNa' | NaNaFe2+(Mn2+,Mn3+)(PO4)3 (?) |
| 8.AC.05 | O'Danielite | Na(Zn,Mg)3(AsO4)(AsO3OH)2 |
| 8.AC.05 | Howardevansite | NaCuFe2(VO4)3 |
| 8.AC.05 | Khrenovite | Na3Fe3+2(AsO4)3 |
| 8.AC.05 | Zincobradaczekite | NaZn2Cu2(AsO4)3 |
| 8.AC.05 | Paraberzeliite | NaCa2Mg2(AsO4)3 |
| 8.AC.05 | Badalovite | Na2Mg2Fe(AsO4)3 |
| 8.AC.05 | Magnesiocanutite | NaMnMg2[AsO4]2[AsO2(OH)2] |
| 8.AC.05 | Manganohatertite | NaNaCa(MnFe3+)(AsO4)3 |
| 8.AC.05 | Camanchacaite | NaCaMg2[AsO4][AsO3(OH)]2 |
| 8.AC.07 | Zhanghuifenite | Na3Mn4Mg2Al(PO4)6 |
| 8.AC.07 | Ferrobobfergusonite | Na2Fe2+5Fe3+Al(PO4)6 |
| 8.AC.10 | Hagendorfite | NaCaMn2+Fe2+2(PO4)3 |
| 8.AC.10 | 'Ferrohagendorfite' | NaCaFe2+Fe2+2(PO4)3 |
| 8.AC.10 | Johillerite | Na(Mg,Zn)3Cu(AsO4)3 |
| 8.AC.10 | Varulite | NaCaMn2+Mn2+2(PO4)3 |
| 8.AC.10 | Nickenichite | Na0.8Ca0.4Cu0.4(Mg,Fe)3(AsO4)3 |
| 8.AC.10 | Arseniopleite | NaCaMnMn2(AsO4)3 |
| 8.AC.10 | Groatite | NaCaMn2(PO4)[PO3(OH)]2 |
| 8.AC.10 | Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| 8.AC.10 | Bradaczekite | NaCu4(AsO4)3 |
| 8.AC.10 | Caryinite | (Na,Pb)(Ca,Na)CaMn2+2(AsO4)3 |
| 8.AC.10 | Ferroalluaudite | (Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3 |
| 8.AC.10 | Maghagendorfite | (Na,◻)MgMn2+(Fe2+,Fe3+)2(PO4)3 |
| 8.AC.15 | Ferrowyllieite | (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 |
| 8.AC.15 | Qingheiite | NaNaMn2+(MgAl)(PO4)3 |
| 8.AC.15 | Rosemaryite | (Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3 |
| 8.AC.15 | Ferroqingheiite | NaNaFe2+(MgAl)(PO4)3 |
| 8.AC.15 | Ferrorosemaryite | ◻NaFe2+Fe3+Al(PO4)3 |
| 8.AC.15 | Bobfergusonite | Na2Mn5FeAl(PO4)6 |
| 8.AC.15 | Wyllieite | (Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3 |
| 8.AC.17 | Czochralskiite | Na4Ca3Mg(PO4)4 |
| 8.AC.18 | Manitobaite | Na16Mn2+ 25Al8(PO4)30 |
| 8.AC.20 | Marićite | NaFe2+(PO4) |
| 8.AC.25 | Schäferite | (NaCa2)Mg2(VO4)3 |
| 8.AC.25 | Berzeliite | (NaCa2)Mg2(AsO4)3 |
| 8.AC.25 | Matyhite | Ca18(Ca,◻)2Fe2+2(PO4)14 |
| 8.AC.25 | Hedegaardite | (Ca,Na)9(Ca,Na)Mg(PO4)6(PO3OH) |
| 8.AC.25 | Manganberzeliite | (NaCa2)Mn2+2(AsO4)3 |
| 8.AC.25 | Palenzonaite | (NaCa2)Mn2+2(VO4)3 |
| 8.AC.30 | Brianite | Na2CaMg(PO4)2 |
| 8.AC.35 | Vitusite-(Ce) | Na3(Ce,La,Nd)(PO4)2 |
| 8.AC.40 | Bario-olgite | (Ba,Sr)(Na,Sr,REE)2Na(PO4)2 · |
| 8.AC.40 | Olgite | (Sr,Ba)(Na,Sr,REE)2Na(PO4)2 |
| 8.AC.45 | Magnesiochangesite-(Ce) | (Ca8Ce)◻Mg(PO4)7 |
| 8.AC.45 | Tuite | Ca3(PO4)2 |
| 8.AC.45 | Ferromerrillite | Ca9NaFe2+(PO4)7 |
| 8.AC.45 | Strontiowhitlockite | Sr9Mg(PO4)6(PO3OH) |
| 8.AC.45 | Magnesiochangesite-(Y) | (Ca8Y)◻ Mg(PO4)7 |
| 8.AC.45 | Changesite-(Ce) | (Ca8Ce)◻Fe2+(PO4)7 |
| 8.AC.45 | Merrillite | Ca9NaMg(PO4)7 |
| 8.AC.47 | Iwateite | Na2BaMn(PO4)2 |
| 8.AC.47 | Ozerovaite | Na2KAl3(AsO4)4 |
| 8.AC.47 | Yurmarinite | Na7(Fe3+,Mg,Cu)4(AsO4)6 |
| 8.AC.47 | Pansnerite | K3Na3(Fe3+,Al)6(AsO4)8 |
| 8.AC.47 | Anatolyite | Na6(Ca,Na)(Mg,Fe3+)3Al(AsO4)6 |
| 8.AC.50 | Fillowite | Na3CaMn2+11(PO4)9 |
| 8.AC.50 | Galileiite | Na3Fe2+Fe2+11(PO4)9 |
| 8.AC.50 | Johnsomervilleite | Na3CaFe11(PO4)9 |
| 8.AC.50 | Xenophyllite | Na4Fe2+7(PO4)6 |
| 8.AC.50 | Udinaite | NaMg4(VO4)3 |
| 8.AC.50 | Arsenudinaite | NaMg4(AsO4)3 |
| 8.AC.50 | Chladniite | Na3CaMg11(PO4)9 |
| 8.AC.52 | Lasnierite | (Ca,Sr)(Mg,Fe2+)2Al(P[O,F]4)3 |
| 8.AC.55 | Pharmazincite | KZnAsO4 |
| 8.AC.57 | Zubkovaite | Ca3Cu3(AsO4)4 |
| 8.AC.60 | Kosnarite | KZr2(PO4)3 |
| 8.AC.65 | Panethite | (Na,Ca)2(Mg,Fe2+)2(PO4)2 |
| 8.AC.70 | Stanfieldite | Ca4Mg5(PO4)6 |
| 8.AC.75 | Ronneburgite | K2MnV4O12 |
| 8.AC.80 | Tillmannsite | Ag3Hg[(V,As)O4] |
| 8.AC.85 | Filatovite | K(Al,Zn)2(As,Si)2O8 |
Fluorescence of Whitlockite
Not fluorescent.
Other Information
IR Spectrum:
Spectrum very similar to that of synthetic tricalcium phosphate.
Electrical:
Piezoelectric, pyroelectric.
Notes:
Readily soluble in dilute acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Whitlockite
mindat.org URL:
https://www.mindat.org/min-4280.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Whitlockite
Reference List:
Frondel, Clifford (1941) Whitlockite: a new calcium phosphate, Ca3(PO4)2. American Mineralogist, 26 (3) 145-152
Frondel, Clifford (1943) Mineralogy of the calcium phosphates in insular phosphate rock. American Mineralogist, 28 (4) 215-232
Bannister, F. A. (1947) Whitlockite from Sebdou, Oran, Algeria. Mineralogical Magazine and Journal of the Mineralogical Society, 28 (196) 29-30 doi:10.1180/minmag.1947.028.196.06
Frondel, Clifford (1949) Wolfeite, xanthoxenite and whitlockite from the Palermo Mine, New Hampshire. American Mineralogist, 34 (9-10) 692-705
GOPAL, R.; CALVO, C. (1972) Structural Relationship of Whitlockite and βCa3(PO4)2. Nature Physical Science, 237 (71). 30-32 doi:10.1038/physci237030a0
Gopal, Ramanathan, Calvo, Crispin, Ito, Jun, Sabine, W. K. (1974) Crystal Structure of Synthetic Mg-Whitlockite, Ca18Mg2H2(PO4)14. Canadian Journal of Chemistry, 52 (7). 1155-1164 doi:10.1139/v74-181
Calvo, C, Gopal R. (1975) The crystal structure of whitlockite from the Palermo quarry. American Mineralogist, 60 (1-2) 120-133
Kostiner, E., Rea, J. R. (1976) The crystal structure of manganese-whitlockite, Ca18Mn2H2(PO4)14. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 32 (1) 250-253 doi:10.1107/s0567740876002690
Schroeder, L.W., Dickens, B., Brown, W.E. (1977) Crystallographic studies of the role of Mg as a stabilizing impurity in β-Ca3(PO4)2. II. Refinement of Mg-containing β-Ca3(PO4)2. Journal of Solid State Chemistry, 22. 253-262 doi:10.1016/0022-4596(77)90002-0
Dowty, Eric (1977) Phosphate in Angra dos Reis: Structure and composition of the Ca3(PO4)2 minerals. Earth and Planetary Science Letters, 35 (2) 347-351 doi:10.1016/0012-821x(77)90136-4
Tsirlin, Alexander A.; Dikarev, Evgeny V.; Shpanchenko, Roman V.; Antipov, Evgeny V. (2006) A new whitlockite, Ca8.42Na1.16V(PO4)7. Acta Crystallographica Section C Crystal Structure Communications, 62 (2). i13-i15 doi:10.1107/s0108270105039041
Hughes, J. M., Jolliff, B. L., Rakovan, J. (2008) The crystal chemistry of whitlockite and merrillite and the dehydrogenation of whitlockite to merrillite. American Mineralogist, 93 (8) 1300-1305 doi:10.2138/am.2008.2683
Tait, K. T.; Barkley, M. C.; Thompson, R. M.; Origlieri, M. J.; Evans, S. H.; Prewitt, C. T.; Yang, H. (2011) Bobdownsite, a new mineral species from Big Fish River, Yukon, Canada, and its structural relationship with whitlockite-type compounds. The Canadian Mineralogist, 49 (4). 1065-1078 doi:10.3749/canmin.49.4.1065
Adcock, C. T., Hausrath, E. M., Forster, P. M., Tschauner, O., Sefein, K. J. (2014) Synthesis and characterization of the Mars-relevant phosphate minerals Fe- and Mg-whitlockite and merrillite and a possible mechanism that maintains charge balance during whitlockite to merrillite transformation. American Mineralogist, 99 (7) 1221-1232 doi:10.2138/am.2014.4688
McCubbin, Francis M., Phillips, Brian L., Adcock, Christopher T., Tait, Kimberly T., Steele, Andrew, Vaughn, John S., Fries, Marc D., Atudorei, Viorel, Vander Kaaden, Kathleen E., Hausrath, Elisabeth M. (2018) Discreditation of bobdownsite and the establishment of criteria for the identification of minerals with essential monofluorophosphate (PO3F2–) American Mineralogist, 103 (8) 1319-1328 doi:10.2138/am-2018-6440("bobdownsite" = whitlockite)
Capitelli, Francesco, Bosi, Ferdinando, Capelli, Silvia C., Radica, Francesco, Della Ventura, Giancarlo (2021) Neutron and XRD Single-Crystal Diffraction Study and Vibrational Properties of Whitlockite, the Natural Counterpart of Synthetic Tricalcium Phosphate. Crystals, 11 (3). 225 doi:10.3390/cryst11030225
Localities for Whitlockite
Showing 138 localities.
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Algeria | |
| Bannister (1947) +1 other reference |
Anguilla | |
| Palache et al. (1951) | |
Antarctica | |
| Semenova et al. (1992, March) |
| Brandstätter et al. (2014) |
| Brandstätter et al. (2014) | |
| Brandstätter et al. (2014) | |
Argentina | |
| Hwang et al. (2014) |
| Bunch et al. (1970) |
Australia | |
| Pring et al. (1999) +1 other reference |
| Forbes et al. (2006) |
| Snow et al. (2014) |
| Bunch et al. (1970) |
| Caves: processes +1 other reference |
| Bridge (1977) |
Austria | |
| Walter (1998) +1 other reference |
| Pichler (2009) |
Bahamas | |
| Onac et al. (2001) +1 other reference |
Brazil | |
| adsabs.harvard.edu (n.d.) |
| Heim et al. (March 1999) |
| Sergio Varvello collection |
| Prinz et al. (1977) +1 other reference |
Canada | |
| 153-155. +2 other references |
| GSC locality database +1 other reference |
| Davis et al. (1989, March) |
| Horvath (2003) +1 other reference |
| Richard Gunter Collection. | |
| [MinRec 23:Yukon 34] +1 other reference | |
Cape Verde | |
| Maffeis et al. (2026) |
| Maffeis et al. (2026) | |
Chile | |
| Kimura et al. (1991) |
China | |
| Kuiren Wang and Junxin Wang (1987) |
| Xie et al. (2014) |
| Chen et al. (2008) +1 other reference |
| Chen et al. (2004) |
| Wankang Huang et al. (1978) |
| Wang et al. (2009) |
| Connolly et al. (2006) |
Cuba | |
| Anthony et al. (2016) |
Curaçao | |
| Palache et al. (1951) +1 other reference | |
France | |
| Audra et al. (2019) |
Germany | |
| Neumair et al. (2016) |
| Dill (2015) |
| Weiß (1990) |
| Blaß et al. (1995) |
| Matthes (1995) |
| Wittern (2001) |
| Witzke et al. (1998) |
India | |
| Lundberg et al. (1988) |
| Kurat et al. (2005) |
Iran | |
| Amin et al. (2022) |
| Adib D. (1979) |
Italy | |
| Maras et al. (1979) |
| Levi-Donati G.R. (1972) |
Kenya | |
| Schulze et al. (1993) +1 other reference |
Malaysia | |
| Bridge et al. (1983) +1 other reference |
Mexico | |
| Forti (2006) |
| Panczner (1987) |
| Michel-Lévy et al. (1978) |
Middle East | |
| Vapnik et al. (2006) | |
Morocco | |
| Favreau (2012) |
| Favreau (2012) |
Namibia | |
| von Bezing (2007) |
| Keller (1974) | |
| Keller et al. (1989) |
| New Mineral Names. Mineral News et al. (January 2012) |
Nigeria | |
| McCoy et al. (1999) +2 other references |
Northwest Africa Meteorites | |
| Greshake (2014) | |
Norway | |
| Morton (1961) |
Oman | |
| MPS 37 (2002) |
| Meteoritical Bulletin et al. (2003) | |
| Taylor et al. (2000) |
| Yukio et al. (2006) | |
Philippines | |
| H. J. Axon and M. J. Nasir (1977) |
Poland | |
| Karwowski et al. (2015) |
| Pieczka A. et al. (2004) |
| Włodek et al. (2011) |
| Pieczka et al. (2015) | |
| Pieczka et al. (2017) | |
| Stepniewski et al. (1998) |
| Kruszewski et al. (2012) |
Portugal | |
| Leal Gomes et al. (2009) |
Romania | |
| HÎRTOPANU et al. (2014) |
| HÎRTOPANU et al. (2025) |
| Puşcaş et al. (2014) |
Russia | |
| Sokol et al. (2022) |
| Pavel M. Kartashov (n.d.) |
| Zaslavskaya et al. (1991, March) |
| Sharygin et al. (2006) |
| - (2010) |
Saint Helena, Ascension and Tristan da Cunha | |
| [var: Martinite (of Kloos)] Richards (1928) +1 other reference | |
Saudi Arabia | |
| Saudi Geological Survey Open-File ... +1 other reference |
South Africa | |
| Martini et al. (1978) |
| Martini (1997) |
| Martini et al. (1978) |
| Miller et al. (2016) |
Spain | |
| Takeda et al. (2003) |
| Domanik et al. (2005) |
| Calvo (2015) |
| Rosell et al. (2010) |
USA | |
| Lydon (1964) +3 other references |
| Bunch et al. (1970) |
| Fuchs L H (1967) |
| Davis et al. (1989, March) |
| King et al. (1994) +1 other reference |
| Anthony et al. (2016) | |
| King et al. (6) | |
| Barrick Gold Corporation |
| Min News (1999) |
| Kampf et al. (2016) |
| Adams (2019) |
| Rocks & Minerals: 16: 208-211. +6 other references |
| Rocks & Min.:64:504. +1 other reference |
| [var: Martinite (of Kloos)] Anthony et al. (2016) |
| Wise (1997) | |
| Januzzi et al. (1976) |
| Rocks & Minerals: 60: 117. +2 other references |
| Smith et al. (2000) |
| Rubin et al. (1983) |
| - (2005) |
| - (2005) | |
| - (2005) | |
| - (2005) | |
| - (2005) | |
| - (2005) | |
| - (2005) | |
| - (2005) |
| - (2005) |
| Meteoritics |
| Bunch et al. (1970) |
Venezuela | |
| Frondel (1943) +1 other reference |
| Urbani (1996) |
| Franco Urbani (2009) | |
Outer Space | |
| Terada et al. (2018) |
The Moon | |
| Dowty et al. (1974) |
| Peckett et al. (1972) +1 other reference |
Quick NavTopAbout WhitlockiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesVarietiesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List







symbol to view information about a locality.
The
Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA