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Gatedalite

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About GatedaliteHide

Formula:
ZrMn2+2Mn3+4SiO12
Colour:
grey
Lustre:
Sub-Metallic
Specific Gravity:
4.783 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
Named by U. Hålenius and F. Bosi in 2013 in honor of amateur mineralogist Kjell Gatedal (b. 1947) from Nora, Örebro, Sweden, for his contributions to the mineralogy of Långban-type deposits.
This page provides mineralogical data about Gatedalite.


Classification of GatedaliteHide

Approved
Approval Year:
2013

Physical Properties of GatedaliteHide

Sub-Metallic
Transparency:
Opaque
Colour:
grey
Density:
4.783 g/cm3 (Calculated)

Optical Data of GatedaliteHide

Type:
Anisotropic
Anisotropism:
weak
Comments:
reflectivity in air varying between 17.1 and 20.8% in the visible spectral range

Chemical Properties of GatedaliteHide

Formula:
ZrMn2+2Mn3+4SiO12
IMA Formula:
ZrMn2+2Mn3+4O8(SiO4)

Crystallography of GatedaliteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/acd
Setting:
I41/acd
Cell Parameters:
a = 9.4668(6) Å, c = 18.8701(14) Å
Ratio:
a:c = 1 : 1.993
Unit Cell V:
1,691.14 ų (Calculated from Unit Cell)
Z:
8
Comment:
I41/acd

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.730(100)
2.367(12)
2.359(6)
1.6735(12)
1.671(29)
1.427(16)
1.423(10)
Comments:
From Type Description.

Type Occurrence of GatedaliteHide

General Appearance of Type Material:
small (⩽60 μm), grey, submetallic, irregularly rounded anhedral grains.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Swedish Museum of Natural History, Stockholm, Sweden, registration number 20130001
Geological Setting of Type Material:
hausmannite-impregnated skarn
Associated Minerals at Type Locality:

Synonyms of GatedaliteHide

Relationship of Gatedalite to other SpeciesHide

Member of:
Other Members of this group:
AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
BrauniteMn2+Mn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
Braunite-IICaMn3+14(SiO4)O20Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd

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 GatedaliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hålenius, U., Bosi, F. (2013) Gatedalite, IMA 2013-091. CNMNC Newsletter No. 18, December 2013, page 3256. Mineralogical Magazine: 77: 3249-3258.
Hålenius, U., Bosi, F. (2014) Gatedalite, a new Zr-rich braunite group mineral from Långban, Sweden. 21st General Meeting of the IMA (IMA2014), Gauteng, South Africa, September 1-5; Abstract Volume, 373.
Hålenius, U., Bosi, F. (2015) Gatedalite, Zr(Mn2+2Mn3+4)SiO12, a new mineral species of the braunite group from Långban, Sweden. Mineralogical Magazine: 79(3): 625-634.

Internet Links for GatedaliteHide

Localities for GatedaliteHide

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.
Sweden (TL)
 
  • Värmland
    • Filipstad
Hålenius, U. and Bosi, F. (2013) Gatedalite, IMA 2013-091. CNMNC Newsletter No. 18, December 2013, page 3256; Mineralogical Magazine, 77, 3249-3258.
Mineral and/or Locality  
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