Marićit

Marićit
	Marićit from the type locality “Big Fish River”, Canada (size ≈ 10 cm) - exhibited in the Royal Ontario Museum
General and classification
other names	IMA 1976-024
chemical formula	Na [10] Fe [6] [PO 4 ]; NaFe 2+ [PO 4 ];
Mineral class; (and possibly department)	Phosphates, arsenates and vanadates
System no. to Strunz ; and to Dana	8.AC.20 ( 8th edition : VII / A.02) ; 01/38/09/01
Crystallographic Data
Crystal system	orthorhombic
Crystal class ; symbol	orthorhombic-dipyramidal; 2 / m 2 / m 2 / m
Space group	Pbnm (No. 62, position 3)
Lattice parameters	a = 5.04 Å ; b = 8.99 Å; c = 6.86 Å
Formula units	Z = 4
Physical Properties
Mohs hardness	4 to 4.5
Density (g / cm 3 )	measured: 3.66 (2); calculated: 3.69
Cleavage	is missing
Break ; Tenacity	not defined
colour	colorless, light gray, light brown
Line color	White
transparency	transparent to translucent
shine	Glass gloss
Crystal optics
Refractive indices	n α = 1.676 ; n β = 1.695 ; n γ = 1.698
Birefringence	δ = 0.022
Optical character	biaxial negative
Axis angle	2V = measured: 44 °

Marićite is a very rare mineral from the mineral class of "phosphates, arsenates and vanadates". It crystallizes in the orthorhombic crystal system with the chemical composition NaFe [PO ₄ ] and is therefore chemically a sodium - iron - phosphate .

Marićite is transparent to translucent and is mostly found in the form of radial or niery mineral aggregates . It rarely forms coarse crystals with a glass-like sheen on the surfaces. In its pure form, Marićit is colorless and transparent. However , it can also take on a light gray to light brown color due to foreign admixtures, whereby the transparency decreases accordingly.

Etymology and history

Marićit was first discovered on the Big Fish River in the Dawson mining area in the Canadian Yukon and described in 1977 by B. Darko Sturman, Joseph Anthony Mandarino and MI Corlett, who named the mineral after the Croatian mineralogist and former professor of mineralogy and petrology at the University of Zagreb Luka Marić (1899–1979) named.

Type material of the mineral is kept in the Mineralogical-Petrographic Museum of the University of Zagreb in Croatia, the Royal Ontario Museum in Canada (Catalog No. M34241) and the National Museum of Natural History in Washington, DC in the USA (Catalog No. 145745) .

classification

Already in the outdated, but partly still in use 8th edition of the mineral classification according to Strunz , the Marićit belonged to the mineral class of "phosphates, arsenates and vanadates" and there to the division of "anhydrous phosphates [PO ₄ ] ³⁻ , without foreign anions ", where together with ferrisicklerite , heterosite , lithiophilite , natrophilite , purpurite , sicklerite , simferite , triphyline, it formed the unnamed group VII / A.02 .

The 9th edition of Strunz's mineral systematics , which has been in effect since 2001 and is used by the International Mineralogical Association (IMA), also assigns Marićit to the category of “phosphates etc. without additional anions; without H ₂ O “. However, this is further subdivided according to the relative size of the cations involved , so that the mineral can be found according to its composition in the sub-section “With medium-sized and large cations”, where it is the only member of the unnamed group 8.AC.20 .

The systematics of minerals according to Dana , which is mainly used in the English-speaking world , assigns Marićit to the class of "phosphates, arsenates and vanadates" and there to the department of "anhydrous phosphates etc.". Here it can be found together with Buchwaldit in the unnamed group 38.01.02 within the sub-section “ Anhydrous phosphates etc. A ⁺ B ²⁺ XO ₄ ”.

Education and Locations

At its type locality Big Fish River near Dawson, Marićit appeared in the form of bulbous aggregates in sideritic iron ores. Accompanying minerals include apatite , ludlamite , nahpoite , pyrite , quartz , satterlyite , vivianite , wicksite and wolfeit . In addition, the mineral was found in Canada in Rapid Creek and Crosscut Creek, also located near Dawson .

In Germany, the mineral could so far only be found in the "Grube Sauberg" near Ehrenfriedersdorf in Saxony.

Furthermore, we discovered Marićit still in the Sahara -Meteoriten 03,505 in North Africa, ataxite -Meteorit HOW 88,403 at Mount Howe in East Antarctica , in the Cape York meteorite in Greenland, in Bishunpur LL3.1 meteorites in the Indian state of Uttar Pradesh .

Another location in Poland, more precisely near Michałkowa ( Michelsdorf ) near Walim ( Wüstewaltersdorf ) in the Lower Silesian Voivodeship, is considered questionable so far, as the find has not been confirmed.

Crystal structure

Marićite crystallizes orthorhombically in the space group Pbnm (space group no. 62, position 3) with the lattice parameters a = 5.04 Å ; b = 8.99 Å and c = 6.86 Å and 4 formula units per unit cell . Template: room group / 62.3

literature

BD Sturman, Joseph Anthony Mandarino , MI Corlett: Marićite, a sodium iron phosphate, from the Big Fish River area, Yukon Territory, Canada . In: The Canadian Mineralogist . tape 15 , 1977, pp. 396–398 ( rruff.info [PDF; 257 kB ; accessed on August 14, 2017]).
Yvon Le Page, Gabrielle Donnay: The crystal structure of the new mineral marićite, NaFePO ₄ . In: The Canadian Mineralogist . tape 15 , 1977, pp. 518-521 ( rruff.info [PDF; 293 kB ; accessed on August 14, 2017]).
Friedrich Klockmann : Klockmann's textbook of mineralogy . Ed .: Paul Ramdohr , Hugo Strunz . 16th edition. Enke, Stuttgart 1978, ISBN 3-432-82986-8 , pp. 623 (first edition: 1891).

Web links

Commons : Marićite - collection of pictures, videos and audio files

Individual evidence

↑ ^a ^b ^c ^d Hugo Strunz , Ernest H. Nickel : Strunz Mineralogical Tables. Chemical-structural Mineral Classification System . 9th edition. E. Schweizerbart'sche Verlagbuchhandlung (Nägele and Obermiller), Stuttgart 2001, ISBN 3-510-65188-X , p. 431 .
↑ Stefan Weiß: The large Lapis mineral directory. All minerals from A - Z and their properties . 6th completely revised and supplemented edition. Weise, Munich 2014, ISBN 978-3-921656-80-8 .
↑ ^a ^b ^c Marićite . In: John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, Monte C. Nichols (Eds.): Handbook of Mineralogy, Mineralogical Society of America . 2001 ( handbookofmineralogy.org [PDF; 64 kB ; accessed on August 14, 2017]).
↑ ^a ^b ^c ^d ^e Mindat - Marićite
↑ Luka Marić, 1899-1979 at WorldCat
↑ VV Sharygin, NS Karmanov, NM Podgornykh: Na-Fe-phosphates Globules in Impact Metal troilite Associations of Chelyabinsk meteorites . In: 79th Annual Meeting of the Meteoritical Society . 2016 ( usra.edu [PDF; 128 kB ; accessed on August 14, 2017]).
↑ Find location list for Marićit at the Mineralienatlas and at Mindat
↑ Mindat - Marićite from Michałkowa (Michelsdorf) and Mts, Sudetes Mts, Lower Silesia (Dolnośląskie), Poland

[StrunzNickel-1] Hugo Strunz , Ernest H. Nickel : Strunz Mineralogical Tables. Chemical-structural Mineral Classification System . 9th edition. E. Schweizerbart'sche Verlagbuchhandlung (Nägele and Obermiller), Stuttgart 2001, ISBN 3-510-65188-X , p. 431 .

[Lapis-2] Stefan Weiß: The large Lapis mineral directory. All minerals from A - Z and their properties . 6th completely revised and supplemented edition. Weise, Munich 2014, ISBN 978-3-921656-80-8 .

[Datenblatt-3] Marićite . In: John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, Monte C. Nichols (Eds.): Handbook of Mineralogy, Mineralogical Society of America . 2001 ( handbookofmineralogy.org [PDF; 64 kB ; accessed on August 14, 2017]).

[Mindat-4] Mindat - Marićite

[worldcat.org-5] Luka Marić, 1899-1979 at WorldCat

[Sharygin-et-al-6] VV Sharygin, NS Karmanov, NM Podgornykh: Na-Fe-phosphates Globules in Impact Metal troilite Associations of Chelyabinsk meteorites . In: 79th Annual Meeting of the Meteoritical Society . 2016 ( usra.edu [PDF; 128 kB ; accessed on August 14, 2017]).

[Fundorte-7] Find location list for Marićit at the Mineralienatlas and at Mindat

[Mindat-Michalkowa-8] Mindat - Marićite from Michałkowa (Michelsdorf) and Mts, Sudetes Mts, Lower Silesia (Dolnośląskie), Poland