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Ferri-kaersutite

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Formula:
NaCa2(Mg3Fe3+Ti)(Al2Si6O22)O2
The Kaersutite group minerals are WO2- dominant amphiboles defined with :
A(Na+K+2Ca)> 0.5 apfu,
B: Ca dominant
CTi > 0.5 apfu and
WO > 1.0 apfu


Ferri-kaersutite is defined with
A position: Na dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
Colour:
Brown
Lustre:
Vitreous
Crystal System:
Monoclinic
Ferri-kaersutite was originally described from the Deeti volcanic cone, Gregory Rift, Rift Valley Province, Kenya (IMA2011-035). This material was later renamed Oxo-magnesio-hastingsite by Zaitsev et al.(2013) in the aftermath of the 2012 amphibole nomenclature report. Ferri-kaersutite was published from Harrow Peaks, Victoria Land, Eastern Antarctica, Antarctica by Gentili et al. (2016, IMA 2014-051).

A fluorine-dominant analogue is known: 'Unnamed (F-dominant analogue of ferri-kaersutite)'.


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Classification of Ferri-kaersutiteHide

Approved
Approval Year:
2014

Physical Properties of Ferri-kaersutiteHide

Vitreous
Colour:
Brown
Cleavage:
Perfect
{110}

Chemical Properties of Ferri-kaersutiteHide

Formula:
NaCa2(Mg3Fe3+Ti)(Al2Si6O22)O2

The Kaersutite group minerals are WO2- dominant amphiboles defined with :
A(Na+K+2Ca)> 0.5 apfu,
B: Ca dominant
CTi > 0.5 apfu and
WO > 1.0 apfu


Ferri-kaersutite is defined with
A position: Na dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
IMA Formula:
NaCa2(Mg3Fe3+Ti)(Si6Al2)O22O2

Crystallography of Ferri-kaersutiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.8378(8) Å, b = 18.0562(9) Å, c = 5.3027(4) Å
β = 105.199(9)°
Ratio:
a:b:c = 0.545 : 1 : 0.294
Unit Cell V:
908.99 ų
Z:
2
Morphology:
Prismatic crystals, up to 200 μm in length (TL).

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.4(s)
3.379(ms)
3.266(m)
3.115(ms)
2.938(m)
2.707(s)
2.598(ms)

Type Occurrence of Ferri-kaersutiteHide

General Appearance of Type Material:
Brown prismatic crystals, up to 200 μm in length.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Museo di Storia Naturale, Universita` di Pisa, Via Roma 79, Calci (Pisa), Italy, catalogue number 19689
Associated Minerals at Type Locality:

Synonyms of Ferri-kaersutiteHide

Other Language Names for Ferri-kaersutiteHide

Relationship of Ferri-kaersutite to other SpeciesHide

Other Members of this group:
Ferro-kaersutite{Na}{Ca2}{Fe2+3AlTi}(Al2Si6O22)O2Mon.
Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2 Mon.

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 Ferri-kaersutiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kent Brooks, R.G Platt (1975) Kaersutite-bearing gabbroic inclusions and the late
dike swarm of Kangerdlugssuaq, East Greenland. Mineralogical Magazine: 40: 259-283.
Zaitsev, A.N., Avdontseva, E.Y.,Britvin, S.N., Deme´ny, A., Homonnay, Z., Jeffries, T., Keller, J., Krivovichev, V.G., Markl, G., Platonova, N.V., Siidra, O.I., Spratt, J. (2011) Ferrikaersutite, IMA 2011-035. CNMNC Newsletter No. 10, October 2011, 2556.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031–2048.
Zaitsev, A.N., Avdontseva, E.Y., Britvin, S.N., Demény, A., Homonnay, Z., Jeffries, T.E., Keller, J., Krivovichev, V.G., Markl, G., Platonova, N.V., Siidra, O.I., Spratt, J., Vennemann, T. (2013) Oxo-magnesio-hastingsite, NaCa2(Mg2Fe3+3)(Al2Si6)O22O2, a new anhydrous amphibole from the Deeti volcanic cone, Gregory rift, northern Tanzania. Mineralogical Magazine: 77: 2773-2792.
Gentili, S., Biagioni, C., Comodi, P., Pasero, M., McCammon, C., Bonadiman, C. (2014) Ferri-kaersutite, IMA 2014-051. CNMNC Newsletter No. 22, October 2014, page 1245; Mineralogical Magazine: 78: 1241-1248.
Gentili, S., Biagioni, C., Comodi, P., Pasero, M., McCammon, C., Bonadiman, C. (2016) Ferri-kaersutite, NaCa2(Mg3TiFe3+)(Si6Al2)O22O2, a new oxo-amphibole from Harrow Peaks, Northern Victoria Land, Antarctica. American Mineralogist: 101: 461-468.

Internet Links for Ferri-kaersutiteHide

Localities for Ferri-kaersutiteHide

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.
Antarctica (TL)
 
  • Eastern Antarctica
    • Victoria Land
Gentili, S., Biagioni, C., Comodi, P., Pasero, M., McCammon, C. and Bonadiman, C. (2014) Ferri-kaersutite, IMA 2014-051. CNMNC Newsletter No. 22, October 2014, page 1245; Mineralogical Magazine, 78, 1241-1248; Gentili, S., Biagioni, C., Comodi, P., Pasero, M., Mccammon, C., Bonadiman, C. (2016): Ferri-kaersutite, NaCa2(Mg3TiFe3+)(Si6Al2)O22O2, a new oxo-amphibole from Harrow Peaks, Northern Victoria Land, Antarctica. American Mineralogist, 101, 461-468
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
GREENWOOD, R.C. & EDGAR, A.D. (1984): Petrogenesis of the gabbros from Mont St Hilaire, Quebec, Canada. Geological Journal (Liverpool) 19, 353 376.
    • Montréal
      • Montréal-Est
Martin, R.F., Alarie, E., Minarik, W.G. Wáczek, Zs. & MCCammon, C.A. (2016): Titanium-rich magnesio-hastingsite macrocrysts in a camptonite dike, Lafarge quarry, Montreal Island, Québec: early crystallization in a pseudo-unary system. Canadian Mineralogist 54, 65-78.
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Andernach
        • Nickenich
in the collection of Christof Schäfer
      • Mayen
        • Ettringen
          • Bellerberg volcano
in the collection of Christof Schäfer. ID verified by EMPA and SXRD
      • Mendig
        • Bell
Nikita Chukanov exchange list
Greenland
 
  • Sermersooq
Kent Brooks, R.G Platt (1975): Kaersutite-bearing gabbroic inclusions and the late dike swarm of Kangerdlugssuaq, East Greenland. Mineralogical Magazine Vol 40 pp 259-283
Mineral and/or Locality  
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