Polyphite-VIII
A material that is NOT an approved mineral species
This page is currently not sponsored. Click here to sponsor this page.
Formula:
Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6
Lustre:
Vitreous
Hardness:
5
Crystal System:
Triclinic
This page provides mineralogical data about Polyphite-VIII.
Unique Identifiers
Mindat ID:
7242
Long-form identifier:
mindat:1:1:7242:3
GUID
(UUID V4):
(UUID V4):
d0a4ef56-031a-4fe3-ba5c-e95571019463
Physical Properties of Polyphite-VIII
Vitreous
Hardness:
5 on Mohs scale
Optical Data of Polyphite-VIII
Type:
Biaxial (-)
RI values:
nα = 1.600 nβ = 1.658 nγ = 1.676
2V:
Measured: 56° , Calculated: 56°
Max Birefringence:
δ = 0.076
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:
Moderate
Dispersion:
r < v weak
Chemical Properties of Polyphite-VIII
Formula:
Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6
Crystallography of Polyphite-VIII
Crystal System:
Triclinic
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.
References for Polyphite-VIII
Reference List: