Classification of Lepkhenelmite-Zn |
| IMA status: | Approved 2003 |
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| Strunz 8th edition ID: | 8/E.07-220
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| Nickel-Strunz 10th (pending) edition ID: | 9.CE.30c
9 : SILICATES (Germanates) C : Cyclosilicates E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions |
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| mindat.org URL: | http://www.mindat.org/min-26521.html Please feel free to link to this page. |
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Type Occurrence of Lepkhenelmite-Zn |
| Type Locality: | Pegmatite No. 45, Lepkhe-Nel'm Mt (Lepkhe-Nelm Mt), Seidozero Lake, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia |
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| General Appearance of Type Material: | coarse flattened-prismatic crystals up to 7 x 2.5 x 0.5 mm and crystal clusters up to 1 x 0.5 cm |
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| Geological Setting of type material: | a hydrothermally formed mineral, occurring in cavities of an eudialyte-aegirine-feldspar pegmatite |
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| Associated Minerals at type locality: | |
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Physical Properties of Lepkhenelmite-Zn |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent, Translucent |
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| Colour: | pale brown |
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| Streak: | white |
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| Hardness (Mohs): | 5 |
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| Tenacity: | Brittle |
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| Cleavage: | None Observed |
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| Density (measured): | 2.96 g/cm3 |
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Crystallography of Lepkhenelmite-Zn |
| Crystal System: | Monoclinic |
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| Class (H-M): | m - Domatic |
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| Space Group: | Bm {B1 1m} {Cm} {C1m1} |
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| Cell Parameters: | a = 14.38Å, b = 13.89Å, c = 7.793Å β = 117.52° |
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| Ratio: | a:b:c = 1.035 : 1 : 0.561 |
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| Unit Cell Volume: | V 1380.4 ų |
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| Z: | 2 |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 3.194 | | (100) | | 6.95 | | (37) | | 3.101 | | (22) | | 6.39 | | (10) | | 3.050 | | (8) |
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Optical Data of Lepkhenelmite-Zn |
| Type: | Biaxial |
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| RI values: | nα = 1.683 nβ = 1.692 nγ = 1.795 |
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| 2V: | Measured: 25° |
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| Maximum Birefringence: | δ = 0.112
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | High |
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Chemical Properties of Lepkhenelmite-Zn |
| Formula: | | (Ba,K) | | Zn(Ti,Nb) | | (Si | | O | | ) | | (O,OH) | | · 7H | | O |
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| Essential elements: | Ba, H, O, Si, Ti, Zn |
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| All elements listed in formula: | Ba, H, K, Nb, O, Si, Ti, Zn |
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| Analytical Data: | method for determination of water not known, all others determined by means of electron microprobe analysis
SiO2 (37.01)
TiO2 (18.56)
Nb2O3 (10.60)
Al2O3 (0.42)
ZnO (3.66)
FeO (0.21)
MnO (0.81)
MgO (0.02)
BaO (11.04)
SrO (1.79)
CaO (1.16)
Na2O (0.59)
K2O (1.98)
H2O (11.80) |
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| Common Impurities: | Al,Ca,Fe,K,Mg,Mn,Na,Sr |
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Relationship of Lepkhenelmite-Zn to other Species |
| Member of: | Labuntsovite Group |
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Other Members of Group:
- + | |
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Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Lepkhenelmite-Zn |
| Synonyms: | |
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| Other Languages: | |
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Other Information |
| Fluorescence in UV light: | none |
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| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. |
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References for Lepkhenelmite-Zn |
Reference List:
- + | Pekov, I.V., N.V. Chukanov, G.V. Shilov, N.N. Kononkova, A.E. Zadov (2004): "Lepkhenelmite-Zn, Ba2Zn(Ti,Nb)4[Si4O12]2(O,OH)4 • 7H2O, a new mineral of the labuntsovite group and its crystal structure", Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (Proceedings of the Russian Mineralogical Society): 133(1): 49-59.
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Internet Links for Lepkhenelmite-Zn |
| Search Engines: |
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| External Links: | Look for Lepkhenelmite-Zn on WebmineralLook for Lepkhenelmite-Zn on Athena MineralogyLook for Lepkhenelmite-Zn on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure Database |
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Localities for Lepkhenelmite-Zn |
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