Jadarite

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Jadarite
General and classification
other names

IMA 2006-036

chemical formula NaLi [B 3 SiO 7 (OH)]
Mineral class
(and possibly department) 		Silicates and Germanates
System no. to Strunz
and to Dana 		9.AJ.40
February 54, April 02
Crystallographic Data
Crystal system monoclinic
Crystal class ; symbol monoclinic prismatic; 2 / m
Space group P 2 1 / c (No. 14)Template: room group / 14
Lattice parameters a  = 6.7620 (1)  Å ; b  = 13.8016 (3) Å; c  = 7.6878 (2) Å
β  = 124.089 °
Formula units Z  = 4
Physical Properties
Mohs hardness 4 to 5 ( VHN 200 = 390)
Density (g / cm 3 ) measured: 2.45; calculated: 2.46
Cleavage is missing
Break ; Tenacity uneven to shell-like; brittle
colour White; dark gray in incident light
Line color White
transparency translucent to opaque
shine Porcelain gloss, matt
Other properties
Chemical behavior soluble in cold dilute acids, insoluble in water
Special features weak pink-orange fluorescence

Jadarite is a very rarely occurring mineral from the mineral class of " silicates and germanates ". It crystallizes in the monoclinic crystal system with the chemical composition NaLi [B 3 SiO 7 (OH)] and is therefore a sodium - lithium - boron silicate hydroxide .

So far, jadarite has only been found in the form of aggregates , with the xenomorphic to sub- idiomorphic jadarite crystals present as white sprinkles reaching a size of about 5 to 10 µm .

Etymology and history

It was recognized as an independent mineral by the International Mineralogical Association (IMA) in November 2006 under the provisional designation "IMA 2006-036".

The publication of the results of the research team, consisting of Christopher J. Stanley, Gary C. Jones, Michael S. Rumsey, Christopher Blake, Andrew C. Roberts, John AR Stirling, Graham JC Carpenter, Pamela S. Whitfield, Joel D. Grice and Yvon Le Page, and its official name Jadarit, appeared nine months later in August 2007 in Acta Crystallographica Section B. Structural Science

Even if Jadarit was finally named after its type locality , the Jadar Valley in Serbia , the search for a suitable name turned out to be curious: Dr. Chris Stanley, who was entrusted with the classification and name search for the newly discovered mineral "sodium lithium boron silicate hydroxide" (translated: sodium-lithium-boron-silicate hydroxide ), was amazed to find an older message about a mineral on the Internet almost the same composition under the name kryptonite , which turned out to be fictitious after a short time. Stanley told the BBC:

"Towards the end of my research I searched the web using the mineral's chemical formula - sodium lithium boron silicate hydroxide - and was amazed to discover that same scientific name, written on a case of rock containing kryptonite stolen by Lex Luthor from a museum in the film Superman Returns. "

- BBC NEWS CHANNEL - 'Kryptonite' discovered in mine (April 24, 2007)

Differentiation between jadarite and fictional "kryptonite"

In contrast to the fictitious "kryptonite", real existing jadarite contains neither fluorine nor traces of an equally fictitious element "kryptonium" with the alleged ordinal number 126 (for comparison: the heaviest known element so far is the oganesson with the real ordinal number 118). Jadarite does not contain any traces of the actually existing noble gas krypton . According to the rules of the international nomenclature for minerals, it was therefore not allowed to be called "kryptonite".

classification

Since the jadarite was only discovered in 2006 and recognized as an independent mineral, it is not listed in the outdated 8th edition of the mineral classification according to Strunz . Only in the “Lapis Mineral Directory”, which was last updated in 2018, which, out of consideration for private collectors and institutional collections, is still based on Karl Hugo Strunz's classic system , Jadarit received the system and mineral no. VIII / H.23-105 . In the "Lapis Classification" this department "phyllosilicates" corresponds to where the mineral along with Baileychlor , Borocookeit , Chamosite , cookeite , Donbassite , franklinfurnaceite , Gonyerit , Clinochlore , Manandonit , Nimit , Pennantit and sudoite the " chlorite " with the system -No. VIII / H.23 forms.

The systematics of minerals according to Strunz (9th edition), valid since 2001 and updated by the International Mineralogical Association (IMA) until 2009, for the department of island silicates and the subdivision "with BO 3 triangles and / or B [4] -, Be [4 ] Tetrahedra, corner-dividing with SiO 4 “, where he is the only member of the unnamed group 9.AJ.40 .

The common in the English language nomenclature of minerals by Dana also assigns jadarite in the department of island silicates, there, however, in the subdivision of the "island silicates: borosilicates and some Beryllosilikate B in [4] coordination" where he along with Garrelsit and Okanoganit- (Y) the group " Howlite and related minerals " with the system no. 54.02.04 forms.

Crystal structure

Jadarite crystallizes monoclinically in the space group P 2 1 / c (space group no. 14) with the lattice parameters a  = 6.7620  Å ; b  = 13.8016 Å; c  = 7.6878 Å and β = 124.089 ° as well as four formula units per unit cell . Template: room group / 14

properties

Jadarite is soluble in cold, dilute acids, but insoluble in water. Under short- and long-wave UV light , the mineral shows pink to orange fluorescence .

Education and Locations

Jadarite was discovered in the drill cores during research in the Jadar Basin. This consists of layers of oil shale , dolomites and pyroclastic deposits of the Neogene (early to middle Miocene ).

Apart from its type locality, no other sites are known so far (status: 2019).

See also

literature

  • Christopher J. Stanley, Gary C. Jones, Michael S. Rumsey, Christopher Blake, Andrew C. Roberts, John AR Stirling, Graham JC Carpenter, Pamela S. Whitfield, Joel D. Grice, Yvon Le Page: Jadarite, LiNaSiB 3 O 7 (OH), a new mineral species from the Jadar Basin, Serbia . In: European Journal of Mineralogy Volume . tape 19 , no. 4 , August 2007, p. 575–580 , doi : 10.1127 / 0935-1221 / 2007 / 0019-1741 ( available online at rruff.info [PDF; 601 kB ; accessed on April 19, 2019]).
  • Glenn Poirier, Kim Tait, T. Scott Ercit, Ralph Rowe, Paula C. Piilonen: New mineral names . In: American Mineralogist . tape 93 , 2008, p. 702–706 , doi : 10.2138 / am.2008.508 (English, available online at rruff.info [PDF; 908 kB ]).
  • Jadarite . In: John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, Monte C. Nichols (Eds.): Handbook of Mineralogy, Mineralogical Society of America . 2001 (English, handbookofmineralogy.org [PDF; 213 kB ; accessed on April 19, 2019]).
  • American-Mineralogist-Crystal-Structure-Database - Jadarite. In: rruff.geo.arizona.edu. Accessed April 19, 2019 .

Web links

Individual evidence

  1. ↑ 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 .
  2. ↑ David Barthelmy: Jadarite MineralData. In: webmineral.com. Accessed April 19, 2019 .
  3. ↑ a b c Pamela S. Whitfield, Yvon Le Page, Joel D. Grice, Christopher J. Stanley, Gary C. Jones, Michael S. Rumsey, Chris Blake, Andrew C. Roberts, John AR Stirling, Gordon JC Carpenter: LiNaSiB 3 O 7 (OH) - Novel structure of the new borosilicate mineral jadarite determined from laboratory powder diffraction data . In: Acta Crystallographica Section B Structural Science . tape 63 , no. 3 , July 2007, p. 396-401 , doi : 10.1107 / S0108768107010130 (English, available online at ResearchGate ).
  4. ↑ a b c d Christopher J. Stanley, Gary C. Jones, Michael S. Rumsey, Christopher Blake, Andrew C. Roberts, John AR Stirling, Graham JC Carpenter, Pamela S. Whitfield, Joel D. Grice, Yvon Le Page: Jadarite, LiNaSiB 3 O 7 (OH), a new mineral species from the Jadar Basin, Serbia . In: European Journal of Mineralogy Volume . tape 19 , no. 4 , September 13, 2007, p. 575–580 , doi : 10.1127 / 0935-1221 / 2007 / 0019-1741 ( available online at rruff.info [PDF; 601 kB ; accessed on April 19, 2019]).
  5. ↑ cis / Reuters: New Mineral. Researcher finds kryptonite. In: spiegel.de. Spiegel Online, April 24, 2007, accessed April 19, 2019 .
  6. ^ Ernest H. Nickel, Joel D. Grice: The IMA Commission on New Mineral and Mineral Names: Procedures and Guidelines on Mineral Nomenclature . In: The Canadian Mineralogist . tape 36 , 1998 (English, available online at cnmnc.main.jp [PDF; 315 kB ; accessed on April 19, 2019]). Intern. mineralogical association, rules for new minerals, their nomenclature and classification (English)
  7. ^ Markus C. Schulte von Drach : Non-Fiction. Kryptonite exists! In: sueddeutsche.de. Süddeutsche Zeitung, May 17, 2010, accessed on April 19, 2019 .
  8. ↑ Ernest H. Nickel, Monte C. Nichols: IMA / CNMNC List of Minerals 2009. (PDF 1703 kB) In: cnmnc.main.jp. IMA / CNMNC, January 2009, accessed April 19, 2019 .
  9. ↑ Find location list for jadarite at the Mineralienatlas and at Mindat