Beusite-(Ca)
A valid IMA mineral species
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Formula:
CaMn2+2(PO4)2
Colour:
Pale-brown
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
3.610 (Calculated)
Crystal System:
Monoclinic
Member of:
A member of the graftonite group with Ca completely ordered at the [8]-coordinated M(1) site.
The Ca analogue of beusite.
Occurs in granite pegmatites. May be formed by exsolution from a high-temperature (Li,Ca)-rich graftonite-like parent phase.
The Ca analogue of beusite.
Occurs in granite pegmatites. May be formed by exsolution from a high-temperature (Li,Ca)-rich graftonite-like parent phase.
Unique Identifiers
Mindat ID:
52167
Long-form identifier:
mindat:1:1:52167:9
GUID
(UUID V4):
(UUID V4):
6dbf605d-b3ca-4591-9c0f-b4c1637f3957
IMA Classification of Beusite-(Ca)
Approved
Approval year:
2017
First published:
2018
Type description reference:
Hawthorne, Frank C., Wise, Michael A., Černý, Petr, Abdu, Yassir A., Ball, Neil A., Pieczka, Adam, Włodek, Adam (2018) Beusite-(Ca), ideally CaMn22+(PO4)2, a new graftonite-group mineral from the Yellowknife pegmatite field, Northwest Territories, Canada: Description and crystal structure. Mineralogical Magazine, 82 (6) 1323-1332 doi:10.1180/mgm.2018.120
Classification of Beusite-(Ca)
8.AB.20
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
B : With medium-sized cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
B : With medium-sized cations
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 |
|---|---|---|
| Beu-Ca | 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 Beusite-(Ca)
Vitreous
Colour:
Pale-brown
Streak:
Very pale-brown
Hardness:
5 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Density:
3.610 g/cm3 (Calculated)
Optical Data of Beusite-(Ca)
Type:
Biaxial (+)
RI values:
nα = 1.685(2) nβ = 1.688(2) nγ = 1.700(5)
Max Birefringence:
δ = 0.015
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
Colour in reflected light:
Colourless in plane-polarized light
Pleochroism:
Non-pleochroic
Comments:
X || b; Y ˄ a = 40.3° in β obtuse; Z ˄ a = 49.7° in β acute.
Comments:
The optic axial angle is 46.0(5)°.
Chemistry of Beusite-(Ca)
Mindat Formula:
CaMn2+2(PO4)2
Elements listed:
Crystallography of Beusite-(Ca)
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.799(2) Å, b = 11.724(2) Å, c = 6.170(1) Å
β = 99.23(3)°
β = 99.23(3)°
Ratio:
a:b:c = 0.751 : 1 : 0.526
Unit Cell V:
628.3 ų
Z:
4
Morphology:
As lamellae 0.1–1.5 mm wide in tripylite
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.564 Å | (97) |
| 3.030 Å | (58) |
| 2.991 Å | (76) |
| 2.932 Å | (87) |
| 2.904 Å | (100) |
| 2.873 Å | (86) |
| 2.718 Å | (86) |
| 1.937 Å | (47) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Beusite-(Ca)
General Appearance of Type Material:
As pale-brown lamellae 0.1–1.5 mm wide in triphylite
Place of Conservation of Type Material:
Collections of the Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA, catalogue number 177054
Empirical Formula of Type Material:
(Ca0.94Fe0.92Mn1.13)Σ2.99(PO4)2.00
Chemical Analysis of Type Material:
| P2O5 | 41.63 % |
|---|---|
| FeO | 19.43 % |
| MnO | 23.63 % |
| CaO | 15.45 % |
| Total: | 100.14 % |
Geological Setting of Type Material:
A beryl–columbite–phosphate rare-element pegmatite
Associated Minerals at Type Locality:
Reference:
Hawthorne, F.C., Wise, M.A., Černý, P., Abdu, Y.A., Ball, N.A., Pieczka, A., Włodek, A. (2018): Beusite-(Ca), ideally CaMn2+2(PO4)2, a new graftonite-group mineral from the Yellowknife pegmatite field, Northwest Territories, Canada: Description and crystal structure. Mineralogical Magazine, 82: 1323-1332.
Relationship of Beusite-(Ca) to other Species
Member of:
Other Members of this group:
| Beusite | Mn2+Mn2+2 (PO4)2 | Mon. 2/m : P21/b |
| Graftonite | Fe2+Fe2+2(PO4)2 | Mon. 2/m : P21/b |
| Graftonite-(Ca) | CaFe2+2(PO4)2 | Mon. 2/m : P21/b |
| Graftonite-(Mn) | MnFe2+2(PO4)2 | Mon. 2/m : P21/b |
Related Minerals - Strunz-mindat Grouping
| 8.AB. | Rodolicoite | Fe3+PO4 |
| 8.AB. | Johanngeorgenstadtite | Ni2+4.5(AsO4)3 |
| 8.AB. | Borisenkoite | Cu3[(V,As)O4]2 |
| 8.AB. | Niasite | Ni2+4.5(AsO4)3 |
| 8.AB. | Olsenite | KFe4(PO4)3 |
| 8.AB. | Karwowskiite | Ca9Mg(Fe2+0.5◻0.5)(PO4)7 |
| 8.AB.05 | Farringtonite | Mg3(PO4)2 |
| 8.AB.10 | Ferrisicklerite | Li1-x(Fe3+xFe2+1-x)PO4 |
| 8.AB.10 | Heterosite | (Fe3+,Mn3+)PO4 |
| 8.AB.10 | Lithiophilite | LiMn2+PO4 |
| 8.AB.10 | Natrophilite | NaMn2+PO4 |
| 8.AB.10 | Purpurite | Mn3+(PO4) |
| 8.AB.10 | Sicklerite | Li1-x(Mn3+xMn2+1-x)PO4 |
| 8.AB.10 | Simferite | LiMg(PO4) |
| 8.AB.10 | Triphylite | LiFe2+PO4 |
| 8.AB.10 | Karenwebberite | NaFe2+PO4 |
| 8.AB.15 | Sarcopside | (Fe2+,Mn2+,Mg)3(PO4)2 |
| 8.AB.15 | Chopinite | (Mg,Fe2+)3(PO4)2 |
| 8.AB.15 | Zavalíaite | (Mn2+,Fe2+,Mg)3(PO4)2 |
| 8.AB.20 | Beusite | Mn2+Mn2+2 (PO4)2 |
| 8.AB.20 | Graftonite | Fe2+Fe2+2(PO4)2 |
| 8.AB.20 | Graftonite-(Ca) | CaFe2+2(PO4)2 |
| 8.AB.20 | Graftonite-(Mn) | MnFe2+2(PO4)2 |
| 8.AB.25 | Xanthiosite | Ni3(AsO4)2 |
| 8.AB.30 | Lammerite | Cu3(AsO4)2 |
| 8.AB.30 | Paralammerite | Cu3(AsO4)2 |
| 8.AB.35 | Mcbirneyite | Cu3(VO4)2 |
| 8.AB.35 | Stranskiite | Zn2Cu(AsO4)2 |
| 8.AB.35 | Pseudolyonsite | Cu3(VO4)2 |
| 8.AB.40 | Lyonsite | Cu3Fe4(VO4)6 |
| 8.AB.40 | Michalskiite | Fe3+1.33Cu2+2(MgFe3+)2(VO4)6 |
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.
Internet Links for Beusite-(Ca)
mindat.org URL:
https://www.mindat.org/min-52167.html
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References for Beusite-(Ca)
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2017) New minerals and nomenclature modifications approved in 2017, CNMNC Newsletter No 39. Mineralogical Magazine, 81 (5) 1279-1286 doi:10.1180/minmag.2017.081.072
Hawthorne, Frank C., Wise, Michael A., Černý, Petr, Abdu, Yassir A., Ball, Neil A., Pieczka, Adam, Włodek, Adam (2018) Beusite-(Ca), ideally CaMn22+(PO4)2, a new graftonite-group mineral from the Yellowknife pegmatite field, Northwest Territories, Canada: Description and crystal structure. Mineralogical Magazine, 82 (6) 1323-1332 doi:10.1180/mgm.2018.120
Hawthorne, Frank C., Wise, Michael A., Černý, Petr, Abdu, Yassir A., Ball, Neil A., Pieczka, Adam, Włodek, Adam (2018) Beusite-(Ca), ideally CaMn22+(PO4)2, a new graftonite-group mineral from the Yellowknife pegmatite field, Northwest Territories, Canada: Description and crystal structure. Mineralogical Magazine, 82 (6) 1323-1332 doi:10.1180/mgm.2018.120
Localities for Beusite-(Ca)
symbol to view information about a locality.
The 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.
Canada (TL) | |
| Hawthorne, Frank C., Wise, Michael A., Černý, Petr, Abdu, Yassir A., Ball, Neil A., Pieczka, Adam, Włodek, Adam (2018) Beusite-(Ca), ideally CaMn22+(PO4)2, a new graftonite-group mineral from the Yellowknife pegmatite field, Northwest Territories, Canada: Description and crystal structure. Mineralogical Magazine, 82 (6) 1323-1332 doi:10.1180/mgm.2018.120 |
Poland | |
|
