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Clinophosinaite
A valid IMA mineral species
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About Clinophosinaite
Formula:
Na12(Ca,Sr)4(Si4O12)(PO4)4
Colour:
Light violet
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.85 - 2.88
Crystal System:
Monoclinic
Name:
A monoclinic polymorph of phosinaite.
This page provides mineralogical data about Clinophosinaite.
Unique Identifiers
Mindat ID:
1081
Long-form identifier:
mindat:1:1:1081:4
IMA Classification of Clinophosinaite
Approved
IMA Formula:
Na3Ca(SiO3)(PO4)
Approval year:
1979
First published:
1981
Classification of Clinophosinaite
9.CF.15
9 : SILICATES (Germanates)
C : Cyclosilicates
F : [Si4O12]8- 4-membered single rings, with insular complex anions
9 : SILICATES (Germanates)
C : Cyclosilicates
F : [Si4O12]8- 4-membered single rings, with insular complex anions
17.6.5
17 : Silicates Containing other Anions
6 : Silicates with phosphate
17 : Silicates Containing other Anions
6 : Silicates with phosphate
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 for Standard |
|---|---|---|
| Cpsi | 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 Clinophosinaite
Vitreous
Transparency:
Transparent
Colour:
Light violet
Hardness:
4 on Mohs scale
Fracture:
Conchoidal
Density:
2.85 - 2.88 g/cm3 (Measured) 2.84 g/cm3 (Calculated)
Optical Data of Clinophosinaite
Type:
Biaxial (+)
RI values:
nα = 1.556 - 1.557 nβ = 1.559 - 1.561 nγ = 1.563 - 1.567
2V:
Measured: 75° to 80°, Calculated: 80°
Max. Birefringence:
δ = 0.007 - 0.010
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:
Low (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 biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r > v strong
Chemistry of Clinophosinaite
Mindat Formula:
Na12(Ca,Sr)4(Si4O12)(PO4)4
Element Weights:
Common Impurities:
Ce,Mn,Sr,K
Crystallography of Clinophosinaite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/b
Setting:
P2/c
Cell Parameters:
a = 7.303(2) Å, b = 12.201(5) Å, c = 14.715(4) Å
β = 91.96°
β = 91.96°
Ratio:
a:b:c = 0.599 : 1 : 1.206
Unit Cell V:
1,310.40 ų (Calculated from Unit Cell)
Z:
8
Crystal Structure
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Unit Cell | Unit Cell Packed
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Unit Cell | Unit Cell Packed
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CIF File Best | x | y | z | a | b | c
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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) |
|---|---|---|---|---|---|---|---|
| 0015582 | Clinophosinaite | Krutik V M, Pushcharovsky D Y, Khomyakov A P, Pobedimskaya E A, Belov N V (1980) Anion radical of mixed type (four [S4O12] rings and P orthotetrahedra) in the structure of monoclinic fosinaite Soviet Physics Crystallography 25 138-142 | 1980 | Khibiny pegmatites, Kola Peninsula, Russia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.724 Å | (100) |
| 2.639 Å | (57) |
| 2.550 Å | (50) |
| 2.031 Å | (50) |
| 1.823 Å | (47) |
Comments:
Khibiny massif, Kola, Russia. Data from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Clinophosinaite
Co-Type Localities:
General Appearance of Type Material:
Irregular grains from 1-2 mm in zirsinalite.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 8159
Geological Setting of Type Material:
Alkalic pegmatite. Possible breakdown product (with zirsinalite) of eudialyte.
Associated Minerals at Type Locality:
Synonyms of Clinophosinaite
Other Language Names for Clinophosinaite
Related Minerals - Strunz-mindat Grouping
| 9.CF. | Bobmeyerite | Pb4(Al3Cu)(Si4O12)(S0.5Si0.5O4)(OH)7Cl(H2O)3 |
| 9.CF.05 | Ashburtonite | Pb4Cu4(Si4O12)(HCO3)4(OH)3Cl · H2O |
| 9.CF.10 | Kainosite-(Y) | Ca2Y2(SiO3)4(CO3) · H2O |
| 9.CF.15 | Phosinaite-(Ce) | Na13Ca2(Ce,La,Th,Nd,Pr)(Si4O12)(PO4)4 |
| 9.CF.20 | Strakhovite | NaBa3Mn2+2Mn3+2Si6O19(OH)3 |
| 9.CF.25 | Cerchiaraite-(Al) | Ba4Al4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl |
| 9.CF.25 | Cerchiaraite-(Fe) | Ba4Fe3+4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl |
| 9.CF.25 | Cerchiaraite-(Mn) | Ba4Mn3+4(Si4O12)O2(OH)4Cl2[Si2O3(OH)4] |
Other Information
Notes:
Easily decomposed at low temperature by 10% HCl.
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 Clinophosinaite
mindat.org URL:
https://www.mindat.org/min-1081.html
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Please feel free to link to this page.
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References for Clinophosinaite
Reference List:
Localities for Clinophosinaite
Showing 4 localities.
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.
Russia (TL) | |
| [World of Stones 95:5-6 +2 other references |
| Roberto Bosi collection. | |
| Tony Nikischer and Luis Menezes +1 other reference |
| Khomyakov et al. (1983) +1 other reference |
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Rasvumchorr Mt, Murmansk Oblast, Russia