Koenenite

Koenenite

Bergmannssegen potash mine, Lehrte, Hanover Region, Lower Saxony, Germany

Koenenite

Bergmannssegen potash mine, Lehrte, Hanover Region, Lower Saxony, Germany

Koenenite

Bergmannssegen potash mine, Lehrte, Hanover Region, Lower Saxony, Germany

Koenenite

Bergmannssegen potash mine, Lehrte, Hanover Region, Lower Saxony, Germany

Koenenite

Bergmannssegen potash mine, Lehrte, Hanover Region, Lower Saxony, Germany

Koenenite

Bergmannssegen potash mine, Lehrte, Hanover Region, Lower Saxony, Germany

Koenenite

Bergmannssegen potash mine, Lehrte, Hanover Region, Lower Saxony, Germany

Koenenite

Bergmannssegen potash mine, Lehrte, Hanover Region, Lower Saxony, Germany

About KoeneniteHide

Adolf von Koenen

Formula:

Na₄Mg₉Al₄Cl₁₂(OH)₂₂

Colour:

Colourless; tinted pale yellow to deep red due to included hematite. Reddish brown to colourless in transmitted light.

Lustre:

Pearly

Hardness:

1½

Specific Gravity:

1.82 - 2.08

Crystal System:

Trigonal

Name:

After Adolf von Koenen (21 March 1837, Potsdam – 5 May 1915, Göttingen), of Göttingen, geologist/paleontologist, who first identified the mineral.

Type Locality:

ⓘ Wittekind-Hildasglück mine, Volpriehausen, Uslar, Northeim District, Lower Saxony, Germany

This page provides mineralogical data about Koenenite.

Unique IdentifiersHide

IMA Classification of KoeneniteHide

Classification of KoeneniteHide

Mineral SymbolsHide

Physical Properties of KoeneniteHide

Optical Data of KoeneniteHide

Type:

Uniaxial (+)

RI values:

n_ω = 1.520 n_ε = 1.550

2V:

Measured: 10°

Max Birefringence:

δ = 0.030

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Low

Pleochroism:

Visible

Comments:

Dichroic: O = red-brown; E = colourless

Chemistry of KoeneniteHide

Crystallography of KoeneniteHide

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0010653	Koenenite	Allmann R, Lohse H N, Hellner E (1968) Die kristallstruktur des koenenits, eine doppelschichtstruktur mit zwei inkommensurablen teilgittern Zeitschrift fur Kristallographie 126 7-22		1968		0	293
0010654	Koenenite	Allmann R, Lohse H N, Hellner E (1968) Die kristallstruktur des koenenits, eine doppelschichtstruktur mit zwei inkommensurablen teilgittern Zeitschrift fur Kristallographie 126 7-22		1968		0	293

CIF Raw Data - click here to closedata_global _chemical_name_mineral 'Koenenite' loop_ _publ_author_name 'Allmann R' 'Lohse H N' 'Hellner E' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 126 _journal_year 1968 _journal_page_first 7 _journal_page_last 22 _publ_section_title ; Die kristallstruktur des koenenits, eine doppelschichtstruktur mit zwei inkommensurablen teilgittern Note: one of two substructures in koenenite ; _database_code_amcsd 0010653 _chemical_formula_sum '(Na.667 Ca.222 Mg.111) Cl2' _cell_length_a 4.072 _cell_length_b 4.072 _cell_length_c 32.64 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 468.701 _exptl_crystal_density_diffrn 1.040 _symmetry_space_group_name_H-M 'R -3 m' loop_ _space_group_symop_operation_xyz 'x,y,z' '2/3+x,1/3+y,1/3+z' '1/3+x,2/3+y,2/3+z' 'x,x-y,z' '2/3+x,1/3+x-y,1/3+z' '1/3+x,2/3+x-y,2/3+z' 'y,x,-z' '2/3+y,1/3+x,1/3-z' '1/3+y,2/3+x,2/3-z' '-x+y,y,z' '2/3-x+y,1/3+y,1/3+z' '1/3-x+y,2/3+y,2/3+z' '-x,-x+y,-z' '2/3-x,1/3-x+y,1/3-z' '1/3-x,2/3-x+y,2/3-z' '-y,-x,z' '2/3-y,1/3-x,1/3+z' '1/3-y,2/3-x,2/3+z' 'x-y,-y,-z' '2/3+x-y,1/3-y,1/3-z' '1/3+x-y,2/3-y,2/3-z' 'y,-x+y,-z' '2/3+y,1/3-x+y,1/3-z' '1/3+y,2/3-x+y,2/3-z' '-x+y,-x,z' '2/3-x+y,1/3-x,1/3+z' '1/3-x+y,2/3-x,2/3+z' '-x,-y,-z' '2/3-x,1/3-y,1/3-z' '1/3-x,2/3-y,2/3-z' '-y,x-y,z' '2/3-y,1/3+x-y,1/3+z' '1/3-y,2/3+x-y,2/3+z' 'x-y,x,-z' '2/3+x-y,1/3+x,1/3-z' '1/3+x-y,2/3+x,2/3-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv Na 0.00000 0.00000 0.00000 0.66700 0.02913 Ca 0.00000 0.00000 0.00000 0.22200 0.02913 Mg 0.00000 0.00000 0.00000 0.11100 0.02913 Cl 0.66667 0.33333 0.04636 1.00000 0.04559 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Na 0.02660 0.02660 0.04177 0.01330 0.00000 0.00000 Ca 0.02660 0.02660 0.04177 0.01330 0.00000 0.00000 Mg 0.02660 0.02660 0.04177 0.01330 0.00000 0.00000 Cl 0.04813 0.04813 0.04053 0.02406 0.00000 0.00000

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of KoeneniteHide

Synonyms of KoeneniteHide

Other Language Names for KoeneniteHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for KoeneniteHide

References for KoeneniteHide

Localities for KoeneniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Canada
Saskatchewan Esterhazy ⓘ Esterhazy Potash Mines	Kiihn (1968) +1 other reference
China
Qinghai Haixi Mongol and Tibetan Autonomous Prefecture Golmud City (Ge'ermu Co.) ⓘ Qarhan salt lake (Chaerhan salt lake)	Dongsheng Hu (1995)
Yunnan Pu'er Jiangcheng County ⓘ Mengyejing Mine	Jinding Liu and Qun Liu (1984) +1 other reference
Germany
Lower Saxony Celle District Wathlingen ⓘ Niedersachsen potash mine	Weiß (1990)
Hanover Region Lehrte ⓘ Bergmannssegen potash mine	RRUFF ID: R060989
Uetze Hänigsen ⓘ Riedel Potash Works	Bode "Mineralien und Fundstellen BRD" ... +1 other reference
Helmstedt District Grasleben ⓘ Braunschweig-Lüneburg mine	Emser Hefte 1990 (1)
Königslutter am Elm ⓘ Beienrode	Denise Bicknell collection
Hildesheim District Sarstedt ⓘ Glückauf Mine	Dana 7:II:87.
Lüneburg District Lüneburg ⓘ Lüneburger Kalkberg	Wittern (2001)
Northeim District Uslar Volpriehausen ⓘ Wittekind-Hildasglück mine (TL)	Palache et al. (1951) +1 other reference
Saxony-Anhalt Börde Flechtingen Ingersleben ⓘ Morsleben	Mertineit +1 other reference
ⓘ Staßfurt potash deposit	Wittern (2001)