Skip to Main Content
GEOREF RECORD

New zinc and potassium chlorides from fumaroles of the Tolbachik Volcano, Kamchatka, Russia; mineral data and crystal chemistry; I, Mellizinkalite, K (sub 3) Zn (sub 2) Cl (sub 7)

Igor V. Pekov, Natalia V. Zubkova, Vasiliy O. Yapaskurt, Inna S. Lykova, Dmitry I. Belakovskiy, Marina F. Vigasina, Evgeny G. Sidorov, Sergey N. Britvin and Dmitry Yu. Pushcharovsky
New zinc and potassium chlorides from fumaroles of the Tolbachik Volcano, Kamchatka, Russia; mineral data and crystal chemistry; I, Mellizinkalite, K (sub 3) Zn (sub 2) Cl (sub 7)
European Journal of Mineralogy (March 2015) 27 (2): 247-253

Abstract

The new mineral mellizinkalite, K (sub 3) Zn (sub 2) Cl (sub 7) , is found in the Glavnaya Tenoritovaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. Associated minerals are belloite, avdoninite, eriochalcite, sylvite, halite, carnallite, mitscherlichite, sanguite, chrysothallite, romanorlovite, gypsum, chlorothionite, kainite and earlier hematite, tenorite and chalcocyanite. Mellizinkalite occurs as irregularly shaped grains up to 0.5 mm across or crude elongated crystals up to 0.25X1.3 mm, their clusters and crusts up to 2X2 mm in area and up to 0.5 mm thick. The mineral is yellow-brown to reddish brown, transparent, with vitreous lustre. It is moderately brittle, slightly plastic. The Mohs' hardness is ca. 2. Cleavage is not observed, the fracture is uneven. D (sub meas) = 2.46(2) and D (sub calc) = 2.49 3 g cm (super -3) . Mellizinkalite is optically biaxial (-), alpha = 1.556(5), beta = 1.612(5), gamma = 1.663(5) and 2V (sub meas) = 85(5) degrees . The Raman spectrum is reported. The chemical composition (wt.%, electron-microprobe data) is: K 23.5, Rb 0.52, Mg 0.47, Cu 1.77, Zn 24.4, Cl 50.0, total 100.7. The empirical formula calculated on the basis of 12 atoms pfu is: (K (sub 2.95) Rb (sub 0.03) ) (sub Sigma 2.98) (Zn (sub 1.84) Cu (sub 0.14) Mg (sub 0.09) ) (sub Sigma 2.07) Cl (sub 6.95) . Mellizinkalite is triclinic, P1, a = 6.7737(4), b = 10.5715(13), c = 11.0730(9) A, alpha = 117.930(10), beta = 106.909(5), gamma 90.389(8) degrees , V=660.61(10) A (super 3) and Z=2. The strongest reflections of the X-ray powder pattern [d, (I) (hkl)] are: 9.20(69)(001, 010, 0-11), 6.40(100)(100), 5.712(47)(-110, -1-11), 4.608(92)(002, 020), 3.499(55)(012), 3.473(73)(0-13, 0-31, 0-23), 3.393(66)(-201) and 3.075(49)(003). The crystal structure, solved from single-crystal X-ray diffraction data (R = 0.065), is unique. It consists of alternating layers of different ZnCl (sub 4) polyhedra. The Zn(1) cations are located in flat squares which are connected to each other via common Cl-Cl edges to form Zn (sub 2) Cl (sub 6) dimers, whereas Zn(2) cations occupy isolated tetrahedra. Potassium cations occupy sites between the layers of Zn-centred polyhedra. The mineral (IMA2014-010) is named from three Latin words, mellis - honey, zincum and kalium, alluding to its colour and species-defining cations, zinc and potassium.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 27
Serial Issue: 2
Title: New zinc and potassium chlorides from fumaroles of the Tolbachik Volcano, Kamchatka, Russia; mineral data and crystal chemistry; I, Mellizinkalite, K (sub 3) Zn (sub 2) Cl (sub 7)
Affiliation: Moscow State University, Moscow, Russian Federation
Pages: 247-253
Published: 201503
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Germany
References: 23
Accession Number: 2015-052255
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 5 tables
N55°49'02" - N55°49'02", E160°22'02" - E160°22'02"
Secondary Affiliation: Russian Academy of Sciences, Fersman Mineralogical Museum, RUS, Russian FederationRussian Academy of Sciences, Institute of Volcanology and Seismology, RUS, Russian FederationSaint Petersburg State University, RUS, Russian Federation
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201524
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal