Deloneite
A valid IMA mineral species
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About Deloneite
Formula:
(Na0.5REE0.25Ca0.25)(Ca0.75REE0.25)Sr1.5(CaNa0.25REE0.25)(PO4)3F0.5(OH)0.5
Colour:
Bright yellow
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
3.92
Crystal System:
Trigonal
Member of:
Name:
Named in 1996 by Alexander Petrovich Khomyakov, D.V. Lisitin, I.M. Kulikova, and R.K. Rastsvetaeva in honor of Boris Nikolaevich Delone (Delaunay) (15 March 1890, Saint Petersburg, Russian Empire - 17 July 1980, Moscow, Soviet Union), mathematical crystallographer and mountain climber. Originally named deloneite-(Ce). Renamed to deloneite by the IMA in 2010 because the REE does not exist at any sites in higher proportions than other cations.
This page provides mineralogical data about Deloneite.
Unique Identifiers
Mindat ID:
6900
Long-form identifier:
mindat:1:1:6900:3
GUID
(UUID V4):
(UUID V4):
2ae035d4-d604-48cf-bc7d-3c1d7f5d9d07
Classification of Deloneite
Approved
IMA status notes:
Redefined by the IMA
First published:
1996
Type description reference:
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
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
N : With only large cations, (OH, etc.):RO4 = 0.33:1
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Dln | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Deloneite
Vitreous
Transparency:
Transparent
Colour:
Bright yellow
Streak:
White
Hardness:
5 on Mohs scale
Fracture:
Step-Like
Density:
3.92(5) g/cm3 (Measured) 3.95 g/cm3 (Calculated)
Optical Data of Deloneite
Type:
Uniaxial (-)
RI values:
nω = 1.682(2) nε = 1.660(2)
Max Birefringence:
δ = 0.022
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Chemical Properties of Deloneite
Formula:
(Na0.5REE0.25Ca0.25)(Ca0.75REE0.25)Sr1.5(CaNa0.25REE0.25)(PO4)3F0.5(OH)0.5
Crystallography of Deloneite
Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Cell Parameters:
a = 9.51(1) Å, c = 7.01(1) Å
Ratio:
a:c = 1 : 0.737
Unit Cell V:
549.05 ų (Calculated from Unit Cell)
Z:
2
Crystal Structure
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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) |
---|---|---|---|---|---|---|---|
0012350 | Deloneite | Rastsvetaeva R K, Khomyakov A P (1996) Structural features of a new naturally occurring representative of the fluorapatite-deloneite series Crystallography Reports 41 789-792 | 1996 | Khibini alkaline massif, Kola Peninsula, Russia | 0 | 293 | |
0012491 | Deloneite | Rastsvetaeva R F, Khomyakov A P (1996) Crystal structure of deloneite-(Ce), high ordered Ca analogue of belovite Doklady Akademii Nauk SSSR 349 354-357 | 1996 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.84 Å | (100 broad) |
3.12 Å | (40) |
2.753 Å | (40) |
3.51 Å | (30) |
1.967 Å | (30) |
1.870 Å | (30) |
2.288 Å | (20) |
Comments:
Mt. Koashva, Kola Peninsula, Russia. The data are from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
36 : Carbonatites, kimberlites, and related igneous rocks |
Type Occurrence of Deloneite
General Appearance of Type Material:
Intimate intergrowths with belovite and another mineral. Grains 0.05-0.5 mm and rarely up to 1.0-1.5 mm in size.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.
Geological Setting of Type Material:
Hyperagpaitic pegmatite.
Associated Minerals at Type Locality:
Reference:
Khomyakov, A.P., Lisitsin, D.V., Kulikova, I.M., Rastsvetaeva, R.K. (1996) Deloneite-(Ce) NaCa2SrCe(PO4)3F – a new mineral with a belovite-like structure. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 125(5): 83-94.
Synonyms of Deloneite
Other Language Names for Deloneite
Russian:Делонеит-(Ce)
Relationship of Deloneite to other Species
Member of:
Other Members of this group:
Belovite-(Ce) | NaCeSr3(PO4)3F | Trig. 3 : P3 |
Belovite-(La) | NaLaSr3(PO4)3F | Trig. 3 : P3 |
Carlgieseckeite-(Nd) | NaNdCa3(PO4)3F | Trig. 3 : P3 |
Fluorcaphite | SrCaCa3(PO4)3F | Hex. 6/m : P63/m |
Fluorstrophite | SrCaSr3(PO4)3F | Hex. 6/m : P63/m |
Kuannersuite-(Ce) | NaCeBa3(PO4)3F0.5Cl0.5 | Trig. 3 : P3 |
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Deloneite associated with Sitinakite | KNa2Ti4(SiO4)2O5(OH) · 4H2O |
1 photo of Deloneite associated with Natrolite | Na2Al2Si3O10 · 2H2O |
Related Minerals - Strunz-mindat Grouping
8.BN. | Aradite | BaCa6[(SiO4)(VO4)](VO4)2F | Trig. 3m : R3m |
8.BN. | Magganasite | CuFe3+3O(AsO4)3 | Tric. 1 : P1 |
8.BN. | Fluorpyromorphite | Pb5(PO4)3F | Hex. 6/m : P63/m |
8.BN. | Fluorsigaiite | Ca2Sr3(PO4)3F | Hex. 6/m : P63/m |
8.BN. | Fluoralforsite | Ba5(PO4)3F | Hex. 6/m : P6/m |
8.BN.05 | Alforsite | Ba5(PO4)3Cl | Hex. 6/m : P63/m |
8.BN.05 | Belovite-(Ce) | NaCeSr3(PO4)3F | Trig. 3 : P3 |
8.BN.05 | Chlorapatite | Ca5(PO4)3Cl | Hex. 6/m : P63/m |
8.BN.05 | Mimetite-M | Pb5(AsO4)3Cl | Mon. 2/m : P21/b |
8.BN.05 | Johnbaumite-M | Ca5(AsO4)3OH | Mon. 2/m : P21/m |
8.BN.05 | Fluorapatite | Ca5(PO4)3F | Hex. 6/m : P63/m |
8.BN.05 | Hedyphane | Ca2Pb3(AsO4)3Cl | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
8.BN.05 | Hydroxylapatite | Ca5(PO4)3(OH) | Hex. 6/m : P63/m |
8.BN.05 | Johnbaumite | Ca5(AsO4)3(OH) | Hex. 6/m : P63/m |
8.BN.05 | Mimetite | Pb5(AsO4)3Cl | Hex. 6/m : P63/m |
8.BN.05 | Morelandite | Ca2Ba3(AsO4)3Cl | Hex. |
8.BN.05 | Oxypyromorphite | Pb10(PO4)6O | |
8.BN.05 | Pyromorphite | Pb5(PO4)3Cl | Hex. 6/m : P63/m |
8.BN.05 | Fluorstrophite | SrCaSr3(PO4)3F | Hex. 6/m : P63/m |
8.BN.05 | Svabite | Ca5(AsO4)3F | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
8.BN.05 | Turneaureite | Ca5(AsO4)3Cl | Hex. 6/m : P63/m |
8.BN.05 | Vanadinite | Pb5(VO4)3Cl | Hex. 6/m : P63/m |
8.BN.05 | Belovite-(La) | NaLaSr3(PO4)3F | Trig. 3 : P3 |
8.BN.05 | Fluorcaphite | SrCaCa3(PO4)3F | Hex. 6/m : P63/m |
8.BN.05 va | Germanate-pyromorphite | Pb5(PO4)2GeO4 | |
8.BN.05 | Kuannersuite-(Ce) | NaCeBa3(PO4)3F0.5Cl0.5 | Trig. 3 : P3 |
8.BN.05 | Hydroxylapatite-M | Ca5(PO4)3OH | Mon. 2/m : P21/b |
8.BN.05 | Phosphohedyphane | Ca2Pb3(PO4)3Cl | Hex. 6/m : P63/m |
8.BN.05 | Hydroxylpyromorphite | Pb5(PO4)3(OH) | Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm |
8.BN.05 | Stronadelphite | Sr5(PO4)3F | Hex. 6/m : P63/m |
8.BN.05 | Fluorphosphohedyphane | Ca2Pb3(PO4)3F | Hex. 6/m : P63/m |
8.BN.05 | Carlgieseckeite-(Nd) | NaNdCa3(PO4)3F | Trig. 3 : P3 |
8.BN.05 | Vanackerite | Pb4Cd(AsO4)3Cl | Trig. 3 : P3 |
8.BN.05 | Miyahisaite | (Sr,Ca)2Ba3(PO4)3F | Hex. 6/m : P63/m |
8.BN.05 | Unnamed (OH-analogue of Mimetite) | Pb5(AsO4)3(OH) | Hex. 6/m : P63/m |
8.BN.05 | Pieczkaite | Mn5(PO4)3Cl | Hex. 6/m : P63/m |
8.BN.05 | Hydroxylhedyphane | Ca2Pb3(AsO4)3(OH) | Trig. 3 : P3 |
8.BN.05 | Pliniusite | Ca5(VO4)3F | Hex. 6/m : P63/m |
8.BN.05 | Parafiniukite | Ca2Mn3(PO4)3Cl | Hex. 6/m : P63/m |
8.BN.10 | Arctite | Na2Ca4(PO4)3F | Trig. 3m (3 2/m) : R3m |
8.BN.15 | Goryainovite | Ca2(PO4)Cl | Orth. mmm (2/m 2/m 2/m) : Pbcm |
Other Information
Notes:
Readily soluble in 10% HCl or HNO3 at room temperature.
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 Deloneite
mindat.org URL:
https://www.mindat.org/min-6900.html
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References for Deloneite
Reference List:
Localities for Deloneite
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).
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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
|
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Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia