Collinsite (original) (raw)
A valid IMA mineral species - grandfathered
About CollinsiteHide
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Formula:
Ca2Mg(PO4)2 · 2H2O
Colour:
Light brown; light yellow-brown to colourless in transmitted light.
Name:
Named by E. Poitevin and M.F. Connor in 1924 in honor of William Henry Collins (26 October 1878, near Chatsworth, Ontario, Canada - January 14, 1937, Ottawa, Ontario, Canada), geologist and Director, Geological Survey of Canada (1920-1936).
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:1109:5
f95c33ad-b116-4063-8e44-df5981441753
IMA Classification of CollinsiteHide
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Approved, 'Grandfathered' (first described prior to 1959)
Classification of CollinsiteHide
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8.CG.05
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
40.2.2.3
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
19.14.20
19 : Phosphates
14 : Phosphates of Fe and other metals
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Coll | 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 CollinsiteHide
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Colour:
Light brown; light yellow-brown to colourless in transmitted light.
Cleavage:
Imperfect/Fair
On {001} and {010}, fair.
Density:
2.99 g/cm3 (Measured) 3.04 g/cm3 (Calculated)
Optical Data of CollinsiteHide
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RI values:
_n_α = 1.632 _n_β = 1.642 _n_γ = 1.657
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of CollinsiteHide
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Mindat Formula:
Ca2Mg(PO4)2 · 2H2O
Crystallography of CollinsiteHide
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Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 5.73 Å, b = 6.78 Å, c = 5.44 Å
α = 97.29°, β = 108.56°, γ = 107.28°
Ratio:
a:b:c = 0.845 : 1 : 0.802
Unit Cell V:
185.49 ų (Calculated from Unit Cell)
Morphology:
Radial blades or lath-like fibers elongated [100], comprising layers.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0006118 | Collinsite | Herwig S, Hawthorne F C (2006) The topology of hydrogen bonding in brandtite, collinsite and fairfieldite The Canadian Mineralogist 44 1181-1196 |  |
2006 | Rapid Creek, Yukon Territory, Canada | 0 | 293 |
| 0012055 | Collinsite | Brotherton P D, Maslen E N, Pryce M W, White A H (1974) Crystal structure of collinsite Australian Journal of Chemistry 27 653-656 | 1974 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.04 Å | (100) |
| 2.682 Å | (90) |
| 2.713 Å | (80) |
| 2.735 Å | (60) |
| 3.24 Å | (50) |
| 3.14 Å | (50) |
| 3.02 Å | (50) |
Comments:
Milgun Station, Australia. Data from Bridge and Pryce (1974).
Geological EnvironmentHide
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Type Occurrence of CollinsiteHide
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General Appearance of Type Material:
Layers in phosphate nodules, consisting of elongated blades to 1 cm in length by 0.5 mm in width.
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
Vein deposit in andesite.
Associated Minerals at Type Locality:
Other Language Names for CollinsiteHide
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Relationship of Collinsite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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Thermal Behaviour:
Gives a strong reaction for water in a closed tube.
Fuses, with intumescence, at 3 to a brownish slag.
Notes:
Readily soluble in 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 CollinsiteHide
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References for CollinsiteHide
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Reference List:
Liferovich, R. P., Pakhomovsky, Y. A., Bogdanova, A. N., Balaganskaya, E. G., Laajoki, K. V.O., Gehor, S., Chukanov, N. V. (2001) Collinsite in hydrothermal assemblages related to carbonatites in the Kovdor complex, northwestern Russia. The Canadian Mineralogist, 39 (4) 1081-1094 doi:10.2113/gscanmin.39.4.1081
Localities for CollinsiteHide
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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.
Locality ListHide
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- 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.