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Flinteite

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Evgeniy E. Flint
Formula:
K2ZnCl4
Colour:
Light green, light yellow to bright greenish-yellow , colourless
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.49
Crystal System:
Orthorhombic
Name:
Named in honour of Evgeniy Evgenievich Flint (Евгений Евгеньевич Флинт) (7 September 1887, Moscow, Russian Empire – 10 November 1975, Moscow, USSR), crystallographer. He was a professor in the Department of Crystallography, Moscow State University, and later in the Department of Mineralogy and Crystallography MGRI and Institute of Crystallography, USSR Academy of Sciences. He did considerable reasearch on goniometric measurements of crystals.
The natural analogue of a well-known synthetic room-temperature modification of K2ZnCl4, a ferroelectric material.

The most simple natural K-Zn chloride, chemically related to cryobostryxite (hydrated) and mellizinkalite (anhydrous).

In the structure there are 3 Zn sites, with Zn-centered ZnCl4 tetrahedra, and 6 K sites.

Chemically identical phase was reported to crystallize from volcanic gas (Iodake crater, Satsuma-Ioujima volcano) in an experimental condensation in silica tubes, in the temperature range of 400-500oC (Africano et al., 2002).


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Classification of FlinteiteHide

Approved
Approval Year:
2014

Physical Properties of FlinteiteHide

Vitreous
Transparency:
Transparent
Colour:
Light green, light yellow to bright greenish-yellow , colourless
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
One direction of distinct cleavage was observed
Density:
2.49 g/cm3 (Measured)    

Optical Data of FlinteiteHide

Type:
Biaxial (+)
RI values:
nα = 1.573(1) nβ = 1.574(1) nγ = 1.576(1)
2V:
Measured: 40°
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of FlinteiteHide

Formula:
K2ZnCl4
Common Impurities:
Rb,Cs

Crystallography of FlinteiteHide

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pna21
Setting:
Pna21
Cell Parameters:
a = 26.809(1) Å, b = 12.4085(6) Å, c = 7.2512(3) Å
Ratio:
a:b:c = 2.161 : 1 : 0.584
Unit Cell V:
2412.18 ų
Z:
12
Morphology:
Prismatic crystals. Granular aggregates or crusts.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.229(27)
5.123(88)
3.629(98)
3.599(100)
3.133(35)
3.039(26)
2.897(35)
2.688(46)
Comments:
From Type Description.

Type Occurrence of FlinteiteHide

General Appearance of Type Material:
Prismatic crystals up to 0.2 × 0.3 × 1.2 mm and granular aggregates or crusts up to 0.5 × 5 × 5 mm.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 4529/1
Geological Setting of Type Material:
In active fumaroles
Associated Minerals at Type Locality:

Synonyms of FlinteiteHide

Common AssociatesHide

Aphthitalite(K,Na)3Na(SO4)2
AvdoniniteK2Cu5(OH)4Cl8 · H2O
BelloiteCu(OH)Cl
ChlorothioniteK2Cu(SO4)Cl2
ChrysothalliteK6Cu6Tl3+Cl17(OH)4·H2O
ChubaroviteKZn2(BO3)Cl2
EriochalciteCuCl2 · 2H2O
FluoboriteMg3(BO3)(F,OH)3
GypsumCaSO4 · 2H2O
HaliteNaCl
HematiteFe2O3
HollanditeBa(Mn4+6Mn3+2)O16
KainiteKMg(SO4)Cl · 3H2O
KrasheninnikoviteKNa2CaMg(SO4)3F
LangbeiniteK2Mg2(SO4)3
MellizinkaliteK3Zn2Cl7
MitscherlichiteK2CuCl4 · 2H2O
RomanorloviteK8Cu6Cl17(OH)3
SaltonseaiteK3NaMnCl6
SanguiteKCuCl3
SellaiteMgF2
SylviteKCl
TenoriteCuO
VanthoffiteNa6Mg(SO4)4
ZinciteZnO

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.

References for FlinteiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Britvin, S.N., Vigasina, M.F., Sidorov, E.G. and Pushcharovsky, D.Y. (2014) Flinteite, IMA 2014-009. CNMNC Newsletter No. 20, June 2014, page 556; Mineralogical Magazine, 78, 549-558.
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Britvin, S.N., Vigasina, M.F., Sidorov, E.G., Pushcharovsky, D.Y. (2015): New zinc and potassium chlorides from fumaroles of the Tolbachik volcano, Kamchatka, Russia: mineral data and crystal chemistry. II. Flinteite, K2ZnCl4. European Journal of Mineralogy, 27, 581-588.
Africano, F., Van Rompaey, G., Bernard, A., Le Guern, F. (2002): Deposition of trace elements from high temperature gases of Satsuma-Iwojima volcano. Earth Planets Space: 54: 275-286

Internet Links for FlinteiteHide

Localities for FlinteiteHide

ⓘ - 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). 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia
 
  • Kamchatka Krai
    • Tolbachik volcano
      • Great Fissure eruption (Main Fracture)
        • Northern Breakthrough (North Breach)
Pekov, I.V., Zubkova, N.V., Pautov, L.A., Yapaskurt, V.O., Chukanov, N.V., Lykova, I.S., Britvin, S.N., Sidorov, E.G. and Pushcharovsky, D.Y. (2015): Chubarovite,KZn2(BO3)Cl2, a new mineral species from the Tolbachik volcano, Kamchatka, Russia. Canadian Mineralogist. 53: 273-284.
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Britvin, S.N., Vigasina, M.F., Sidorov, E.G. and Pushcharovsky, D.Y. (2014) Flinteite, IMA 2014-009. CNMNC Newsletter No. 20, June 2014, page 556; Mineralogical Magazine, 78, 549-558.; Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Britvin, S.N., Vigasina, M.F., Sidorov, E.G., Pushcharovsky, D.Y. (2015): New zinc and potassium chlorides from fumaroles of the Tolbachik volcano, Kamchatka, Russia: mineral data and crystal chemistry. II. Flinteite, K2ZnCl4. European Journal of Mineralogy, 27, 581-588.; Pekov, I. V., Zubkova, N. V., Britvin, S. N., Yapaskurt, V. O., Chukanov, N. V., Lykova, I. S., ... & Pushcharovsky, D. Y. (2015). New zinc and potassium chlorides from fumaroles of the Tolbachik volcano, Kamchatka, Russia: mineral data and crystal chemistry. III. Cryobostryxite, KZnCl3· 2H2O. European Journal of Mineralogy, 27(6), 805-812
          • Second scoria cone
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Britvin, S.N., Vigasina, M.F., Sidorov, E.G., Pushcharovsky, D.Y. (2015): New zinc and potassium chlorides from fumaroles of the Tolbachik volcano, Kamchatka, Russia: mineral data and crystal chemistry. II. Flinteite, K2ZnCl4. European Journal of Mineralogy, 27, 581-588
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Britvin, S.N., Vigasina, M.F., Sidorov, E.G., Pushcharovsky, D.Y. (2015): New zinc and potassium chlorides from fumaroles of the Tolbachik volcano, Kamchatka, Russia: mineral data and crystal chemistry. II. Flinteite, K2ZnCl4. European Journal of Mineralogy, 27, 581-588
Mineral and/or Locality  
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