magnesioferrite

{{Infobox mineral

| name = Magnesioferrite

| boxwidth =

| image = Magnesioferrite - Ochtendung, Eifel, Germany.jpg

| imagesize = 260px

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| caption = Magnesioferrite from Ochtendung, Eifel, Germany

| category = Oxide minerals
Spinel group
Spinel structural group

| formula = Mg(Fe³⁺)₂O₄

| IMAsymbol = Mfr{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}

| strunz = 4.BB.05

| dana =

| system = Cubic

| class = Hexoctahedral (m{{overline|3}}m)
H-M symbol: (4/m {{overline|3}} 2/m)

| symmetry = Fd{{overline|3}}m

| unit cell = a = 8.3866 Å; Z = 8

| color = Black to brownish black

| habit = As octahedral crystals, massive granular

| twinning = Twin plane {{mset|111}}, contact twins

| cleavage = On {{mset|111}}

| fracture = Uneven

| tenacity = Brittle

| mohs = 6 - 6.5

| luster = Metallic, semimetallic, dull

| streak = Dark red

| diaphaneity = Opaque, transparent in thin fragments

| gravity = 4.55 – 4.65 measured

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| opticalprop = Isotropic

| refractive = n = 2.38

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| other = Magnetic

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| references = [http://rruff.geo.arizona.edu/doclib/hom/magnesioferrite.pdf Handbook of Mineralogy][http://www.mindat.org/min-2501.html Magnesioferrite on Mindat.org][http://webmineral.com/data/Magnesioferrite.shtml Magnesioferrite on Webmineral]

}}

Magnesioferrite is a magnesium iron oxide mineral, a member of the magnetite series of spinels.

Magnesioferrite crystallizes as black metallic octahedral crystals. It is named after its chemical composition of magnesium and ferric iron.

The density is 4.6 - 4.7 (average = 4.65), and the diaphaniety is opaque. Occurs as well-formed fine sized crystals or massive and granular.

Its hardness is 6-6.5. It has a metallic luster and a dark red streak.