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Hillesheimite

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Formula:
(K,Ca,Ba,□)2(Mg,Fe,Ca,□)2[(Si,Al )13O23(OH)6](OH)·8H2O
Hardness:
4
Specific Gravity:
2.16
Crystal System:
Orthorhombic
Name:
For the type locality.
Structurally related to Günterblassite and Umbrianite.



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Classification of HillesheimiteHide

Approved
Approval Year:
2011

Physical Properties of HillesheimiteHide

Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
perfect parallel to (010) and distinct on (100) and (001)
Density:
2.16(1) g/cm3 (Measured)    2.174 g/cm3 (Calculated)

Optical Data of HillesheimiteHide

Type:
Biaxial (-)
RI values:
nα = 1.496(2) nβ = 1.498(2) nγ = 1.499(2)
2V:
Measured: 80°
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of HillesheimiteHide

Formula:
(K,Ca,Ba,□)2(Mg,Fe,Ca,□)2[(Si,Al )13O23(OH)6](OH)·8H2O
IMA Formula:
(K,Ca,Ba,◻)2(Mg,Fe,Ca,◻)2[(Si,Al)13O23(OH)6](OH) · 8H2O

Crystallography of HillesheimiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pmmn
Setting:
Pmmn
Cell Parameters:
a = 6.979(11) Å, b = 37.1815(18) Å, c = 6.5296(15) Å
Ratio:
a:b:c = 0.188 : 1 : 0.176
Unit Cell V:
1,694.36 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.857(58)
6.545(100)
6.284(53)
4.787(96)
4.499(59)
3.065(86)
2.958(62)
2.767(62)

Type Occurrence of HillesheimiteHide

General Appearance of Type Material:
flattened crystals
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow,Russia, registration number 4174/1
Geological Setting of Type Material:
miarolitic cavities in alkali basalt.
Associated Minerals at Type Locality:

Synonyms of HillesheimiteHide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for HillesheimiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chukanov, N.V., Zubkova, N.V.,Pekov, I.V., Belakovsky, D.I., Schüller, W., Ternes, B., Blab, G. and Pushcharovsky, D.Y.(2012): Hillesheimite, IMA 2011-080. CNMNC Newsletter No. 12, February 2012, page 152; Mineralogical Magazine, 76, 151-155
Chukanov, N.V., Zubkova, N.V.,Pekov, I.V., Belakovsky, D.I., Schüller, W., Ternes, B., Blab, G. and Pushcharovsky, D.Y. (2012): Hillesheimite, (K,Ca,Ba,□)2(Mg,Fe,Ca,□)2[(Si,Al )13O23(OH)6](OH)·8H2O new phyllosilicate mineral of the gunterblassite group. Zapiski RMO 141 (3), 29-38.
Chukanov, N. V., Zubkova, N. V., Pekov, I. V., Belakovskiy, D. I., Schüller, W., Ternes, B., ... & Pushcharovsky, D. Y. (2013). Hillesheimite,(K, Ca,□) 2 (Mg, Fe, Ca,□) 2 [(Si, Al) 13O23 (OH) 6](OH)· 8H2O, a new phyllosilicate mineral of the Günterblassite group. Geology of Ore Deposits, 55(7), 549-557.

Internet Links for HillesheimiteHide

Localities for HillesheimiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany (TL)
 
  • Rhineland-Palatinate
    • Hillesheim
Chukanov, N.V., Zubkova, N.V.,Pekov, I.V., Belakovsky, D.I., Schüller, W., Ternes, B., Blab, G. and Pushcharovsky, D.Y.(2012): Hillesheimite, IMA 2011-080. CNMNC Newsletter No. 12, February 2012, page 152; Mineralogical Magazine, 76, 151-155; Chukanov, N. V., Zubkova, N. V., Pekov, I. V., Belakovskiy, D. I., Schüller, W., Ternes, B., ... & Pushcharovsky, D. Y. (2013). Hillesheimite,(K, Ca,□) 2 (Mg, Fe, Ca,□) 2 [(Si, Al) 13O23 (OH) 6](OH)· 8H2O, a new phyllosilicate mineral of the Günterblassite group. Geology of Ore Deposits, 55(7), 549-557.
Mineral and/or Locality  
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