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Sofiite

A valid IMA mineral species
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About SofiiteHide

03534590015253069218927.jpg
Sofia I. Naboko
Formula:
Zn2(SeO3)Cl2
Colour:
Colourless
Lustre:
Vitreous, Greasy, Silky
Hardness:
2 - 2½
Specific Gravity:
3.64 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor of Sofia Ivanovna Naboko (Софьа Ивановна Набоко) (13 September 1909, St Petersburg, Russian Empire - 2005), Institute of Volcanology, Petropavlovsk-Kamchatskii, Russia. Naboko was an investigator of postvolcanic processes of Kamchatka. The mineral nabokoite is also named for her.
A synthetic, monoclinic polymorph is known (Johnsson & Törnroos, 2007).


Unique IdentifiersHide

Mindat ID:
3714
Long-form identifier:
mindat:1:1:3714:9
GUID
(UUID V4):
b7669376-4957-4865-97fd-78d3ecc44587

IMA Classification of SofiiteHide

Classification of SofiiteHide

4.JG.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
G : Selenites with additional anions, without H2O
34.6.5.1

34 : SELENITES, TELLURITES AND SULFITES
6 : Anhydrous Selenites, Tellurites and Sulfites containing Hydroxyl or Halogen
28.1.4

28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
SofIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of SofiiteHide

Vitreous, Greasy, Silky
Transparency:
Transparent
Colour:
Colourless
Comment:
Becoming sky blue on long exposure to air.
Streak:
White
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN10=38 - 61 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Perfect
Perfect {010} and less perfect {201}
Density:
3.64 g/cm3 (Calculated)

Optical Data of SofiiteHide

Type:
Biaxial (+)
RI values:
nα = 1.709(3) nβ = 1.726(2) nγ = 1.750(2)
2V:
Calculated: 81°
Max Birefringence:
δ = 0.041
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v weak

Chemistry of SofiiteHide

Mindat Formula:
Zn2(SeO3)Cl2

Crystallography of SofiiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pccn
Setting:
Pccn
Cell Parameters:
a = 10.251(4) Å, b = 15.223(2) Å, c = 7.666(5) Å
Ratio:
a:b:c = 0.673 : 1 : 0.504
Unit Cell V:
1,196.29 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Pseudo-hexagonal thin-platy to mica-like crystals.
Twinning:
Swallowtail twins on {100}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014495SofiiteSemenova T F, Rozhdestvenskaya I V, Filatov S K, Vergasova L P (1992) Crystal structure and physical properties of sophiite, Zn2(SeO3)Cl2, a new mineral Mineralogical Magazine 56 241-2451992Tolbachik Main Fracture Eruption, Kamchatka, Russia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.61 Å(100)
3.807 Å(23)
3.237 Å(6)
3.055 Å(8)
2.918 Å(12)
2.538 Å(6)
Comments:
Intensities are affected by preferred orientation owing to the {010} cleavage.

Type Occurrence of SofiiteHide

General Appearance of Type Material:
Well-formed, pseudo-hexagonal thin-platy to mica-like crystals.
Place of Conservation of Type Material:
Mining Museum, St. Petersburg, Russia, number 1550/1.
Geological Setting of Type Material:
Fumarolic specimens were collected at temperatures 180-230 °C.
Associated Minerals at Type Locality:
Reference:
Vergasova L.P., Filatov S.K., Semenova T.F., Filosofova T.M. (1989) Sofiite Zn2(SeO3)Cl2 - a new mineral from volcanic sublimates. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 118(1): 65-69.

Synonyms of SofiiteHide

Other Language Names for SofiiteHide

German:Sophiit
Simplified Chinese:氯硒锌石
氯硒锌矿
Spanish:Sophiita
Traditional Chinese:氯硒鋅石
氯硒鋅礦

Related Minerals - Strunz-mindat GroupingHide

4.JG.PrewittiteKPb1.5ZnCu6(SeO3)2O2Cl10Orth. mmm (2/m 2/m 2/m) : Pnnm
4.JG.GuangyuanitePb3Cl3(Se4+O3)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
4.JG.MasaitisiteKCu5O2(SeO3)2Cl3Orth. mmm (2/m 2/m 2/m) : Pnma
4.JG.WangkuirenitePb3Cl2(SeO3)2Mon. 2/m : B2/b
4.JG.05GeorgbokiiteCu5(SeO3)2O2Cl2Mon. 2/m : P21/b
4.JG.05ParageorgbokiiteCu5(SeO3)2O2Cl2Mon. 2/m : P21/b
4.JG.10ChloromeniteCu9(SeO3)4O2Cl6Mon. 2/m
4.JG.20Ilinskite(Na,K)Cu5(SeO3)2O2Cl3Orth. mmm (2/m 2/m 2/m) : Pnma
4.JG.25FrancisiteCu3Bi(SeO3)2O2ClOrth. mmm (2/m 2/m 2/m) : Pmmn
4.JG.30DerriksiteCu4(UO2)(SeO3)2(OH)6Orth.
4.JG.35BurnsiteKCdCu2+7(SeO3)2O2Cl9Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.JG.40AllochalcoseliteCu+PbCu2+5(SeO3)2Cl5O2Mon. 2/m : B2/m
4.JG.45NicksoboleviteCu7(SeO3)2O2Cl6Mon. 2/m : P21/b
4.JG.50PlumboselitePb3O2(SeO3)Orth. mm2 : Cmc21
4.JG.55SarrabusitePb5CuCl4(SeO3)4Mon. 2/m : B2/b

Other InformationHide

Notes:
Readily soluble in dilute acids, soluble with difficulty in water.
Special Storage/
Display Requirements:
Becomes turbid white, and crystals bend and swell, on exposure to air; decomposition products form radial aggregates.
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 SofiiteHide

References for SofiiteHide

Localities for SofiiteHide

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

- 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.
Costa Rica
 
  • Alajuela Province
    • Sarchí Canton
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
Russia (TL)
 
  • Kamchatka Krai
    • Milkovsky District
          • Northern Breakthrough (North Breach)
          • Southern Breakthrough (South Breach)
 
Mineral and/or Locality  
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