Fluoro-magnesiohastingsite Mineral Data

Fluoro-magnesiohastingsite Mineral Data

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General Fluoro-magnesiohastingsite Information

Chemical Formula:

(K,Na)Ca2(Mg,Fe++)4Fe+++[Si6Al2O22](F,OH)2

Composition:

Molecular Weight = 908.68 gm

Potassium 2.58 % K 3.11 % K₂O

Sodium 1.01 % Na 1.36 % Na₂O

Calcium 8.82 % Ca 12.34 % CaO

Magnesium 8.02 % Mg 13.31 % MgO

Aluminum 5.94 % Al 11.22 % Al₂O₃

Iron 12.29 % Fe 7.91 % FeO / 8.79 % Fe₂O₃

Silicon 18.54 % Si 39.67 % SiO₂

Hydrogen 0.07 % H 0.59 % H₂O

Oxygen 39.79 % O

Fluorine 2.93 % F 2.93 % F

- % F -1.23 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_0.6Na_0.4Ca₂Mg₃Fe²⁺Fe³⁺(Si₆Al₂O₂₂)F_1.4(OH)_0.6

Environment:

Microscopic prisms in the groundmass of ultrapotassic lavas.

IMA Status:

Not Submitted IMA

Locality:

Alban Hills volcanic district of central Italy. Link to MinDat.org Location Data.

Name Origin:

Named for the chemistry and relationship to hastinsite.

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Fluoro-magnesiohastingsite Crystallography

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

Physical Properties of Fluoro-magnesiohastingsite

Cleavage:

[110] Perfect, [100] Perfect

Diaphaniety:

Transparent to translucent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Optical Properties of Fluoro-magnesiohastingsite

Optical Data:

Biaxial (-)

Calculated Properties of Fluoro-magnesiohastingsite

Fermion Index

Fermion Index = 0.0196
Boson Index = 0.9804

Photoelectric:

PE_{Fluoro-magnesiohastingsite}= 6.08 barns/electron
U=PE_{Fluoro-magnesiohastingsite} x r_electron= . barns/cc.

Radioactivity:

GRapi = 36.70 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Fluoro-magnesiohastingsite - barely detectable

Fluoro-magnesiohastingsite Classification

Dana Class:

65.0.0.0 (65)Inosilicate Minerals

(65.0)Without Dana Classification Numbers

(Amphiboles - Ca)

Strunz Class:

VIII/FX.00-00 VIII - Silicates

VIII/FX - Unclassified Strunz Inosilicates

VIII/FX.00 - Amphiboles - Ca

Other Fluoro-magnesiohastingsite Information

References:

NAME( AmMin, vol 87, p 996) PHYS. PROP.(AmMin, vol 87, p 996)

See Also:

Links to other databases for Fluoro-magnesiohastingsite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Print or Cut-and-Paste your Fluoro-magnesiohastingsite Specimen Label here :

Fluoro-magnesiohastingsite

(K,Na)Ca2(Mg,Fe++)4Fe+++[Si6Al2O22](F,OH)2
Dana No: Unknown Strunz No: VIII/FX.00-00
Locality:

Notes: