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Foshallasite

A discredited species name
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09061350017271923168624.jpg
Foshallasite

Hackman Valley, Yukspor Mountain, Murmansk Oblast, Russia
09061350017271923168624.jpg
Foshallasite

Hackman Valley, Yukspor Mountain, Murmansk Oblast, Russia
09061350017271923168624.jpg
Foshallasite

Hackman Valley, Yukspor Mountain, Murmansk Oblast, Russia
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About FoshallasiteHide

Formula:
Ca3[Si2O7] · 3H2O(?)
Originally described from Hackman Valley, Yukspor Mt., Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.


Unique IdentifiersHide

Mindat ID:
1586
Long-form identifier:
mindat:1:1:1586:4

IMA Classification of FoshallasiteHide

IMA status:
Discredited

Classification of FoshallasiteHide

Strunz-mindat (2026):
9.HA.55

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
Dana 8th ed.:
56.2.9.3

56 : SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
2 : Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Hey's CIM Ref.:
14.5.22

14 : Silicates not Containing Aluminum
5 : Silicates of Ca

Optical Data of FoshallasiteHide

Type:
Biaxial (-)
RI values:
nα = 1.535 nβ = 1.542 nγ = 1.549
2V:
Measured: 12° to 18°, Calculated: 88°
Max. Birefringence:
δ = 0.014
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.

Surface Relief:
Moderate
Dispersion:
r > v weak

Chemistry of FoshallasiteHide

Mindat Formula:
Ca3[Si2O7] · 3H2O(?)
Element Weights:
Element% weight
O46.721 %
Ca35.110 %
Si16.403 %
H1.766 %

Calculated from ideal end-member formula.
Elements listed:
Ca, H, O, Si - search for minerals with similar chemistry
Common Impurities:
TR,Na

Synonyms of FoshallasiteHide

Other Language Names for FoshallasiteHide

Related Minerals - Strunz-mindat GroupingHide

9.HA.ShinichengiteCa5[BSi2O7(OH)2]2 · 6H2OTric. 1 : P1
9.HA.Kalyuzhnyite-(Ce)NaKCaSrCeTi(Si8O21)OF(H2O)3Mon. 2/m : P2/b
9.HA.MoragiteCa3TiSi2(Al2Si)O14Trig. 3 2 : P3 2 1
9.HA.05ErtixiiteNa2Si4O9Iso.
9.HA.10KenyaiteNa2Si22O41(OH)8 · 6H2OMon.
9.HA.20WawayandaiteCa6Mn2BBe9Si6O23(OH,Cl)15Mon.
9.HA.25MagbasiteKBaFe3+Mg7Si8O22(OH)2F6Orth. mmm (2/m 2/m 2/m) : Cmma
9.HA.35DemagistrisiteBaCa2Mn3+4(Si3O10)(Si2O7)(OH)4 · 3H2OOrth. mm2 : Amm2
9.HA.37DonwilhelmsiteCaAl4Si2O11Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.HA.40KasatkiniteBa2Ca8B5Si8O32(OH)3 · 6H2O Mon.
9.HA.40'Igumnovite'Ca3Al2[SiO4]2[◻Cl4]Iso.
9.HA.42PaqueiteCa3TiSi2(Al,Ti,Si)3O14Trig. 3 2 : P3 2 1
9.HA.42QeltiteCa3TiSi2(Fe3+2Si)O14Trig. 3 2 : P3 2 1
9.HA.45RippiteK2(Nb,Ti)2(Si4O12)O(O,F)Tet.
9.HA.47ZagamiiteCaAl2Si3.5O11Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.HA.50RudenkoiteSr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2OMon.
9.HA.50'α-Carnegieite'NaAlSiO4
9.HA.52'Atheriastite'near Ca5MgFeAl6Si8O32 · 5H2O
9.HA.57'Bhreckite'
9.HA.60NagelschmidtiteCa7(SiO4)2(PO4)2Hex. 6 : P61
9.HA.65Caryochroite[Na(Sr0.5Ca0.5)Mg]3[Fe3+8Mn(Fe2+0.5◻0.5)]10(Ti2Si12O37)(OH)14(H2O)3 Mon. 2/m
9.HA.70JuaniteCa10Mg4Al2Si11O39 · 4H2O or nearOrth.
9.HA.75TacharaniteCa12Al2Si18O33(OH)36Mon.
9.HA.80OyeliteCa10Si8B2O29 · 12.5H2OTric. 1 : P1
9.HA.85DenisoviteK14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4-x) · 2H2OMon.
9.HA.90TiettaiteK4Na12Fe3+Si16O41(OH)4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Cmcm

Other InformationHide

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 FoshallasiteHide

References for FoshallasiteHide

Localities for FoshallasiteHide

Showing 1 localities.

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.
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Locality ListHide

- 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.
Russia
 
  • Murmansk Oblast
    • Yukspor Mountain
[World of Stones 95:5-6
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