Ferrisanidine
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About Ferrisanidine
Formula:
K[Fe3+Si3O8]
Colour:
colorless to white
Lustre:
Vitreous
Specific Gravity:
2.722 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Analogue of sanidine bearing Fe3+ instead of Al
Classification of Ferrisanidine
Physical Properties of Ferrisanidine
Vitreous
Transparency:
Transparent
Colour:
colorless to white
Streak:
white
Cleavage:
Perfect
Density:
2.722 g/cm3 (Calculated)
Optical Data of Ferrisanidine
Type:
Biaxial (-)
RI values:
nα = 1.584(1) nβ = 1.595(1) nγ = 1.605(1)
2V:
Measured: 85° , Calculated: 86.5°
Max Birefringence:
δ = 0.021
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:
Not observed
Pleochroism:
Non-pleochroic
Comments:
Optical properties from synthetic material
Chemical Properties of Ferrisanidine
Formula:
K[Fe3+Si3O8]
IMA Formula:
K(Fe3+Si3O8)
Elements listed:
Crystallography of Ferrisanidine
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 8.678(4) Å, b = 13.144(8) Å, c = 7.337(5) Å
β = 116.39(8)°
β = 116.39(8)°
Ratio:
a:b:c = 0.66 : 1 : 0.558
Unit Cell V:
749.67 ų (Calculated from Unit Cell)
Z:
4
Geological Environment
Paragenetic Mode(s):
Type Occurrence of Ferrisanidine
General Appearance of Type Material:
porous crusts composed by cavernous short prismatic crystals or irregular grains up to 10 μm × 20 μm
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, with catalogue number 96732.
Geological Setting of Type Material:
Fumerole
Associated Minerals at Type Locality:
Reference:
Shchipalkina, N.V.; Pekov, I.V.; Britvin, S.N.; Koshlyakova, N.N.; Vigasina, M.F.; Sidorov, E.G. (2019) A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron. Minerals: 9(12): 770.
Synonyms of Ferrisanidine
Relationship of Ferrisanidine to other Species
Member of:
Other Members of this group:
| Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. | |
| Amazonite | K(AlSi3O8) | |
| Andesine | (Na,Ca)[Al(Si,Al)Si2O8] | Tric. |
| Anorthite | Ca(Al2Si2O8) | Tric. 1 : P1 |
| Banalsite | Na2BaAl4Si4O16 | Orth. mm2 : Iba2 |
| Buddingtonite | (NH4)(AlSi3O8) | Mon. 2 : P21 |
| Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] | Tric. |
| Dmisteinbergite | Ca(Al2Si2O8) | Trig. 3 2 : P3 1 2 |
| Filatovite | K(Al,Zn)2(As,Si)2O8 | Mon. 2/m |
| Hexacelsian | BaAl2Si2O8 | Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm |
| Kokchetavite | K(AlSi3O8) | Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm |
| Kumdykolite | Na(AlSi3O8) | Orth. mmm (2/m 2/m 2/m) : Pnnm |
| Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] | |
| Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] | |
| Paracelsian | Ba(Al2Si2O8) | Mon. |
| Reedmergnerite | NaBSi3O8 | Tric. |
| Slawsonite | Sr(Al2Si2O8) | Mon. 2/m : P21/b |
| Stronalsite | Na2SrAl4Si4O16 | Orth. |
| Sunstone | A variety of feldspar (microcline or oligoclase, more rarely labradorite) that has schiller, ... | |
| Svyatoslavite | Ca(Al2Si2O8) | Orth. |
| Unnamed (New Ordered Member of the Alkali Feldspar Series) | KNa(Si6Al2)O16 | Mon. m |
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 Ferrisanidine
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Shchipalkina, N.V., Pekov, I.V., Britvin, S.N., Koshlyakova, N.N., Vigasina, M.F. and Sidorov, E.G. (2019): Ferrisanidine, IMA 2019-052. CNMNC Newsletter No. 52. Mineralogical Magazine: 83; https://doi.org/10.1180/mgm.2019.73; http://forum.amiminerals.it/viewtopic.php?f=5&t=15946
Shchipalkina, N.V., Pekov, I.V., Britvin, S.N., Koshlyakova, N.N., Vigasina, M.F., Sidorov, E.G. (2019): A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron. Minerals: 9(12): 770, 17 pgs.
Internet Links for Ferrisanidine
mindat.org URL:
https://www.mindat.org/min-54018.html
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External Links:
Mineral Dealers:
Localities for Ferrisanidine
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for 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) | |
| Shchipalkina, N.V.; Pekov, I.V.; Britvin, S.N.; Koshlyakova, N.N.; Vigasina, M.F.; Sidorov, E.G. (2019) A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron. Minerals 9, 770.; Shchipalkina, N. V., Pekov, I. V., Koshlyakova, N. N., Britvin, S. N., Zubkova, N. V., Varlamov, D. A., & Sidorov, E. G. (2020). Unusual silicate mineralization in fumarolic sublimates of the Tolbachik volcano, Kamchatka, Russia–Part 2: Tectosilicates. European Journal of Mineralogy, 32(1), 121-136. |
Spain | |
| Shchipalkina, N.V.; Pekov, I.V.; Britvin, S.N.; Koshlyakova, N.N.; Vigasina, M.F.; Sidorov, E.G. (2019) A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron. Minerals 9, 770. |
| Linthout, K., Lustenhouwer, W.J. (1993) Ferrian high sanidine in a lamproite from Cancarix, Spain. Mineral. Mag.: 57: 289 | |
USA | |
| Shchipalkina, N.V.; Pekov, I.V.; Britvin, S.N.; Koshlyakova, N.N.; Vigasina, M.F.; Sidorov, E.G. (2019) A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron. Minerals 9, 770. |
Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka Krai, Russia