Eckermannite R060320

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Record 18 of 105  

Name: Eckermannite
RRUFF ID: R060320
Ideal Chemistry: NaNa2(Mg4Al)Si8O22(OH)2
Locality: Norra Karr Complex, near Granna, Ostergotsland, Sweden
Source: Michael Scott S100151 [view label]
Owner: RRUFF
Description: Parallel aggregate of blue elongated bladed crystals
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ amphibole (105) ]
RRUFF ID: R060320.2
Sample Description: Microprobe fragment, only darker patches were examined
Measured Chemistry: (Na2.50K0.30   0.20)Σ=3(Mg2.35Fe2+1.35Al1.20Mn0.10)Σ=5Si8.00O22((OH)1.18F0.82)Σ=2; OH estimated by charge balance, dark material
Microprobe Data File: [ Download Excel File ]
Sample Description: Sample is oriented, mounted on a pin, and polished.
Pin ID: M00815
Orientation: Laser parallel to  a*  (1 0 0).     Fiducial mark perpendicular to laser is parallel to  b   [0 1 0].

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RRUFF ID: R060320
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
RRUFF ID: R060320.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 9.712(2)Å    b: 17.741(3)Å    c: 5.2804(7)Å
alpha: 90°    beta: 104.040(9)°    gamma: 90°   Volume: 882.6(2)Å3    Crystal System: monoclinic
  File Type Information Close
Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Eckermannite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Adamson O J (1942) Eckermannite, a new alkali amphibole. Preliminary note., Geologiska Föreningens i Stockholm Förhandlingar, 64, 329-334   [view file]

Leake B E (1978) Nomenclature of amphiboles, American Mineralogist, 63, 1023-1052   [view file]

Leake B E, Woolley A R, Arps C E S, Birch W D, Gilbert M C, Grice J D, Hawthorne F C, Kato A, Kisch H J, Krivovichev V G, Linthout K, Laird J, Mandarino J A, Maresch W V, Nickel E H, Rock N M S, Schumacher J C, Smith D C, Stephenson N C N, Ungaretti L, Whittaker E J W, Youzhi G (1997) Nomenclature of amphiboles: report of the Subcommittee on Amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names, The Canadian Mineralogist, 35, 219-246   [view file]

Leake B E, Woolley A R, Birch W D, Burke E A J, Ferraris G, Grice J D, Hawthorne F C, Kisch H J, Krivovichev V G, Schumacher J C, Stephenson N C N, Whittaker E J W (2003) Nomenclature of amphiboles: additions and revisions to the International Mineralogical Association’s 1997 recommendations, The Canadian Mineralogist, 41, 1355-1362   [view file]

Williams P A, Hatert F, Pasero M, Mills S J (2014) IMA Commission on new minerals, nomenclature and classification (CNMNC) Newsletter 20. New minerals and nomenclature modifications approved in 2014, Mineralogical Magazine, 78, 549-558   [view file]

Oberti R, Boiocchi M, Hawthorne F C, Ball N A, Harlow G E (2015) Eckermannite revised: the new holotype from the Jade Mine Track, Myanmar - crystal structure, mineral data, and hints on the reasons for the rarity of eckermannite, American Mineralogist, 100, 909-914

Danisi R M, Armbruster T (2017) Crystal structure of potassic-mangani-leakeite from the Wessels Mine, Kalahari Manganese Field, South Africa, European Journal of Mineralogy, 29, 143-148