Malinkoite

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Malinkoite
General and classification
other names

IMA 2000-009

chemical formula Na [BSiO 4 ]
Mineral class
(and possibly department) 		Silicates and germanates - framework silicates (tectosilicates) without zeolite H 2 O
System no. to Strunz
and to Dana 		9.FA.10
04.07.02.01
Crystallographic Data
Crystal system hexagonal
Crystal class ; symbol hexagonal-pyramidal; 6th
Space group P 6 3 (No. 173)Template: room group / 173
Lattice parameters a  = 13.8964  Å ; c  = 7.7001 Å
Formula units Z  = 18
Physical Properties
Mohs hardness 7th
Density (g / cm 3 ) measured: 2.90 (2); calculated: 2.93
Cleavage good after {h00} and {001}
Break ; Tenacity hooked; brittle
colour creamy white, light pink, greenish blue
Line color White
transparency translucent to translucent
shine Glass gloss, mother-of-pearl, silk gloss
Crystal optics
Refractive indices n ω  = 1.591
n ε  = 1.582
Birefringence δ = 0.009
Optical character uniaxial negative
Other properties
Chemical behavior insoluble in hydrochloric acid , nitric acid and sulfuric acid

Malinkoite is a very seldom occurring mineral from the mineral class of "silicates and germanates" with the chemical composition Na [BSiO 4 ] and therefore, chemically speaking, a sodium - boron - silicate . Structurally Malinkoit one of the framework silicates (tectosilicates).

Malinkoite crystallizes in the hexagonal crystal system and was found in rosette-shaped mineral aggregates about 3 mm in diameter, consisting of wedge-shaped crystals about 0.5 mm thick and a glass-like sheen on the surfaces. The translucent to transparent crystals are creamy white in color with a pink tinge. Other finds showed spherical aggregate forms in light pink to greenish-blue colors and pearlescent to silk-like sheen.

Etymology and history

Malinkoite was first discovered together with lisite synite in the alkaline pegmatites of the Chibinen - Lowosero complex, more precisely on Mount Karnassurt in the Lowosero tundra on the Russian Kola peninsula . An international research group, consisting of the Russian mineralogists AP Khomyakov , GN Nechelyustov and EV Sokolova as well as the Canadian mineralogist Frank C. Hawthorne , analyzed and described the newly discovered minerals and published their results after their recognition by the International Mineralogical Association (IMA) in 2000 in the Russian journal "Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva".

The mineral was named in honor of the Russian mineralogist Swetlana Vyacheslavovna Malinko ( Russian : Светлана Вячеславовна Малинко , 1927-2002), a specialist and discoverer of numerous boron minerals.

Type material of the mineral is in the Fersman Museum in Moscow under the catalog no. 2613/1 kept.

classification

Since the malinkoite was only recognized as an independent mineral in 2000, it is not yet listed in the 8th edition of the mineral classification according to Strunz , which has been outdated since 1977 . Only in the Lapis mineral directory according to Stefan Weiß, which, out of consideration for private collectors and institutional collections, is still based on this old form of Karl Hugo Strunz's system , was the mineral given the system and mineral number. VIII / J.02-70 . In the "Lapis Classification", this corresponds to the class of "silicates and Germanates" and then the "framework silicates" department (without foreign tetrahedral anions , groups J.01 to J.08) where Malinkoit with Davidsmithit , Kaliophilit , kalsilite , Megakalsilit , Nepheline , Panunzit , Trikalsilit , Trinephelin and Yoshiokait form an independent but unnamed group (as of 2018).

The 9th edition of Strunz's mineral systematics, which has been valid since 2001 and was updated by the IMA until 2009, classifies malinkoite in the category of “tectosilicates without zeolitic H 2 O”. This is further subdivided according to the possible presence of additional anions, so that the mineral can be found according to its composition in the sub-section "Tectosilicates (tectosilicates) without additional anions", where it is the only member of the unnamed group 9.FA.10 .

The systematics of minerals according to Dana , which is mainly used in the English-speaking world , assigns the to the class of "silicates and germanates" and there in the department of "framework silicates: Al-Si lattice". Here he is to be found as the only member of the unnamed group 76.04.02 within the subdivision “ Framework silicates: Al-Si grids with B-Si grids ”.

Chemism

According to the idealized (theoretical) chemical composition of malinkoite (NaBSiO 4 ), the mineral consists of a mass fraction (% by weight) of 18.26% sodium (Na), 8.59% boron (B), 22.31% silicon ( Si) and 50.84% oxygen (O). This corresponds to 24.62% Na 2 O, 27.65% B 2 O 3 and 47.73% SiO 2 .

The analysis of seven grains of the type material showed only a slightly different average composition of 24.36% Na 2 O, 26.88% B 2 O 3 and 47.83% SiO 2 (all data in% by weight). On the basis of 4 oxygen atoms, the values ​​correspond to the empirical formula Na 1.00 B 0.98 Si 1.01 O 4 , which has been idealized into the above formula.

Crystal structure

Malinkoite crystallizes hexagonally in the space group P 6 3 (space group no. 173) with the lattice parameters a  = 13.8964  Å and c  = 7.7001 Å and 18 formula units per unit cell . Template: room group / 173

properties

The mineral is insoluble in hydrochloric acid (HCl), nitric acid (HNO 3 ) and sulfuric acid (H 2 SO 4 ) at room temperature .

With a Mohs hardness of 7, malinkoite is one of the hard minerals that, if it were of the same size as the reference mineral quartz, would be able to scratch window glass with the same hardness . The density of the natural mineral is 2.90 g / cm 3 , the density calculated on the basis of the crystal data is slightly higher at 2.93 g / cm 3 .

Education and Locations

Malinkoite formed in cavities of ussingite-rich cores of hyper- agpaitic pegmatites on Mount Karnassurt and in cavities of "natro-opal" in albitized , pegmatoidal rocks on Mount Alluaiw in the Lowosero Tundra massif on the Russian Kola peninsula.

The only other known location for malinkoite is the "Carrière Poudrette" quarry on Mont Saint-Hilaire in the Canadian province of Québec.

See also

literature

  • Почетный член А. П. Хомяков, д. чл. Г. Н. Нечелюстов, д. чл. Е. В. Соколова, Ф. К. Хоторн: Новые Боросиликаты Малинкоит NaBSiO 4 и Лисицынит KBSI 2 O 6 из щелочных Пегматитов Хибино-Ловозерского Комплекса (Кольский Полуотров) . In: Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva . tape 129 , no. 6 , 2000, pp. 35–42 (Russian, rruff.info [PDF; 583 kB ; accessed on June 2, 2020] engl. Translation: AP Khomyakov, GN Nechelyustov, EV Sokolova, FC Hawthorne: New borosilicates: malinkoite, NaBSiO 4 , and lisitsynite, KBSi 2 O 6 , from alkaline pegmatites of the Khibiny-Lovozero complex, Kola Peninsula).
  • Elena V. Sokolova, Frank C. Hawthorne, Alexander P. Khomyakov: The crystal chemistry of Malinkoite, NaBSiO 4 , and Lisitsynite, KBSi 2 O 6 , from the Khibina – Lovozero complex, Kola peninsula, Russia . In: The Canadian Mineralogist . tape 39 , 2001, p. 159–169 , doi : 10.2113 / gscanmin.39.1.159 (English, rruff.info [PDF; 2.2 MB ; accessed on June 2, 2020] Brief description in French).
  • John L. Jambor , Edward S. Grew, Andrew C. Roberts: New Mineral Names . In: American Mineralogist . tape 87 , 2002, pp. 181–184 (English, rruff.info [PDF; 105 kB ; accessed on June 2, 2020]).
  • Heribert A. Graetsch, Werner Schreyer: Rietveld refinement of synthetic monoclinic NaBSiO 4 . In: The Canadian Mineralogist . tape 43 , 2005, p. 759–767 ( rruff.info [PDF; 575 kB ; accessed on June 2, 2020]).

Web links

Individual evidence

  1. ↑ Malcolm Back, William D. Birch, Michel Blondieau and others: The New IMA List of Minerals - A Work in Progress - Updated: March 2020. (PDF; 2.44 MB) In: cnmnc.main.jp. IMA / CNMNC, Marco Pasero, March 2020, accessed June 2, 2020 .
  2. ↑ a b c Stefan Weiss: The large Lapis mineral directory. All minerals from A - Z and their properties. Status 03/2018 . 7th, completely revised and supplemented edition. Weise, Munich 2018, ISBN 978-3-921656-83-9 .
  3. ↑ a b c d Elena V. Sokolova, Frank C. Hawthorne, Alexander P. Khomyakov: The crystal chemistry of Malinkoite, NaBSiO 4 , and Lisitsynite, KBSi 2 O 6 , from the Khibina – Lovozero complex, Kola peninsula, Russia . In: The Canadian Mineralogist . tape 39 , 2001, p. 159–169 , doi : 10.2113 / gscanmin.39.1.159 (English, rruff.info [PDF; 2.2 MB ; accessed on June 2, 2020] Brief description in French).
  4. ↑ a b David Barthelmy: Malinkoite Mineral Data. In: webmineral.com. Retrieved June 2, 2020 .
  5. ↑ a b c d e f g John L. Jambor , Edward S. Grew, Andrew C. Roberts: New Mineral Names . In: American Mineralogist . tape  87 , 2002, pp. 181–184 (English, rruff.info [PDF; 105 kB ; accessed on June 2, 2020]).
  6. ↑ a b c Malinkoite. In: mindat.org. Hudson Institute of Mineralogy, accessed June 2, 2020 .
  7. ^ Svetlana V. Malinko, S. Anic'ic ', D. Joksimovic', AE Lisitsyn, VV Rudnev, GI Dorokhova, NA Yamnova, VV Vlasov, AA Ozol, Nikita V. Chukanov: Jarandolite Ca [B 3 O 4 (OH ) 3 ], calcium borate from Serbia: New name and new data . In: Fersman Mineralogical Museum, Russian Academy of Science (Ed.): New Data on Minerals . tape 39 , 2004, p. 26–31 , (Malinko year of death, see p. 31) (English, available online at fmm.ru [PDF; 226 kB ; accessed on June 2, 2020]).
  8. ↑ Александр Евсеев (Alexander Evseev): Светлана Вячеславовна Малинко (1927-2002). In: geo.web.ru. Все о, May 7, 2017, accessed June 2, 2020 (short biography and bibliography).
  9. ^ Robert F. Martin, William H. Blackburn: Encyclopedia of Mineral Names: Second update . In: The Canadian Mineralogist . tape 39 , no. 4 , 2001, p. 1199–1218 , doi : 10.2113 / gscanmin.39.4.1199 (English, rruff.info [PDF; 227 kB ; accessed on June 2, 2020] Malinkoite, named after Svetlana Vyacheslavovna Malinko, see p. 1210).
  10. ↑ Catalog of Type Mineral Specimens - M. (PDF 124 kB) In: docs.wixstatic.com. Commission on Museums (IMA), December 12, 2018, accessed June 2, 2020 .
  11. ↑ Ernest H. Nickel , Monte C. Nichols: IMA / CNMNC List of Minerals 2009. (PDF; 1.82 MB) In: cnmnc.main.jp. IMA / CNMNC, January 2009, accessed June 2, 2020 .
  12. ↑ Malinkoite. In: Mineralienatlas Lexikon. Stefan Schorn u. a., accessed on June 2, 2020 .
  13. ↑ List of locations for malinkoite from the Mineralienatlas and Mindat , accessed on June 2, 2020.