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Hapkeite

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Bruce Hapke
Formula:
Fe2Si
Colour:
Silvery, with a slight tarnish
Lustre:
Metallic
Specific Gravity:
6.83 (Calculated)
Crystal System:
Isometric
Name:
Named by M. Anand, L.A. Taylor, M.A. Nazarov, J. Shu, H.K. Mao, and R.J. Hemley in 2003 Bruce William Hapke (b. 17 February 1931), planetary geologist and Professor at the University of Pittsburgh, Pennsylvania, USA, who first predicted the presence of vapor-deposited elemental iron as coatings on lunar soil grains. Asteroid 3549 Hapke is also named in his honor.
One of many natural Fe-Si phases; beside the approved species (listed below) you may want to compare Unnamed (Fe silicide I), Unnamed (Fe silicide II) and UM2000-60-Si:Fe.


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Classification of HapkeiteHide

Approved
Approval Year:
2003
First Published:
2003
1.BB.35

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides and Phosphides
B : Silicides
1.1.33.6

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group

Physical Properties of HapkeiteHide

Metallic
Transparency:
Opaque
Colour:
Silvery, with a slight tarnish
Density:
6.83 g/cm3 (Calculated)

Chemical Properties of HapkeiteHide

Formula:
Fe2Si

Crystallography of HapkeiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Pm3m
Cell Parameters:
a = 2.831 Å
Unit Cell V:
22.69 ų

Type Occurrence of HapkeiteHide

General Appearance of Type Material:
Grains from 2 to 30 microns in size.
Geological Setting of Type Material:
Lunar meteorite - Dhofar-280 - a fragmental highland breccia with well-preserved primary igneous clasts and negligible terrestrial alteration.
Associated Minerals at Type Locality:

Synonyms of HapkeiteHide

Other Language Names for HapkeiteHide

German:Hapkeit
Simplified Chinese:哈普克矿
Traditional Chinese:哈普克礦

Common AssociatesHide

Associated Minerals Based on Photo Data:
Troilite3 photos of Hapkeite associated with Troilite on mindat.org.
Maskelynite1 photo of Hapkeite associated with Maskelynite on mindat.org.
Silica1 photo of Hapkeite associated with Silica on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

1.BB.ZangboiteTiFeSi2Orth. mmm (2/m 2/m 2/m) : Pbam
1.BB.BrownleeiteMnSiIso. 2 3 : P21 3
1.BB.05Suessite(Fe,Ni)3Si
1.BB.05MavlyanoviteMn5Si3Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
1.BB.10UM2001-18-Si:CuPtSn(Cu,Pt)4Si
1.BB.10Perryite(Ni,Fe)5(Si,P)2Trig.
1.BB.15NaquiteFeSiIso. 2 3 : P21 3
1.BB.20LinzhiiteFeSi2Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm
1.BB.25LuobusaiteFe0.84Si2Orth. mmm (2/m 2/m 2/m) : Cmca
1.BB.30GupeiiteFe3SiIso.
1.BB.40XifengiteFe5Si3Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm

Related Minerals - Dana Grouping (8th Ed.)Hide

1.1.33.2NaquiteFeSiIso. 2 3 : P21 3
1.1.33.3LinzhiiteFeSi2Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm
1.1.33.7LuobusaiteFe0.84Si2Orth. mmm (2/m 2/m 2/m) : Cmca
1.1.33.8ZangboiteTiFeSi2Orth. mmm (2/m 2/m 2/m) : Pbam
1.1.33.13MavlyanoviteMn5Si3Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm

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 HapkeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Anand, M., Taylor, L.A., Nazaraov, M.A., Shu, J., Mao, H.K., Hemley, R.J. (2003) New lunar mineral hapkeite: Product of impact-induced vapor-phase deposition in the regolith? Lunar and Planetary Science: 34: 1818-1818.
Anand, M., Taylor, L.A., Nazarov, M.A., Shu, J., Mao, H.K., Hemley, R.J. (2004) Space weathering on airless planetary bodies: Clues from the lunar mineral hapkeite. Proceedings of the National Academy of Sciences: 101(18): 6847-6851.
Jambor, J.L., Grew, E.S., Roberts, A.C. (2005) New mineral names. American Mineralogist: 90: 518-522.

Internet Links for HapkeiteHide

Localities for HapkeiteHide

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.
Oman (TL)
 
  • Dhofar Governorate (Al Janubiyah Province)
LPSC 34, abstract 1818; Mahesh Anand, Lawrence A. Taylor, Mikhail A. Nazarov, J. Shu, H.K. Mao, and Russell J. Hemley (2004) Space weathering on airless planetary bodies: Clues from the lunar mineral hapkeite. PNAS 101:6847–6851
The Moon
 
  • Mare Crisium
Pavel M. Kartashov data
Mineral and/or Locality  
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