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Safflorite

Mineral

Field	Value
name	Safflorite
image	Safflorite and Calcite3 - Bouismas Mine, Bou Azzer, Tazenakht, Ouarzazate, Souss-Massa-Draa, Morocco.jpg
imagesize	260px
caption	Safflorite and calcite from Morocco
category	Arsenide mineral
formula
IMAsymbol	Saf
strunz	2.EB.15a
system	Orthorhombic
class	Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
symmetry	Pnnm
unit cell	a = 5.173 Å, b = 5.954 Å
c = 2.999 Å; Z = 2
color	Tin white, tarnishes to gray
habit	Prismatic crystals, massive to fibrous
twinning	Forms cruciform penetration twins
cleavage	Distinct on {100}
fracture	Uneven to conchoidal
tenacity	Brittle
mohs	4.5–5.5
luster	Metallic
streak	Grayish black
diaphaneity	Opaque
gravity	6.9–7.3
references

H-M symbol: (2/m 2/m 2/m) c = 2.999 Å; Z = 2 | length fast/slow =

Safflorite is a rare cobalt iron arsenide mineral with the chemical formula . Pure safflorite is , but iron is virtually always present. Safflorite is a member of the three-way substitution series of arsenides known as the loellingite group. More than fifty percent iron makes the mineral loellingite whereas more than fifty percent nickel and the mineral is rammelsbergite. A parallel series of antimonide minerals exist.

Safflorite along with the other minerals crystallize in the orthorhombic system forming opaque gray to white massive to radiating forms, Clinosafflorite has a monoclinic symmetry. It has a mohs hardness of 4.5 and a specific gravity of 6.9 to 7.3. Twinning is common and star shaped twins are frequently found.

Polished sample of safflorite, loellingite and rammelsbergite on quartz from the St Andreasberg District, Harz Mountains

It was first described in 1835 from the Schneeberg District, Ore Mountains, Germany. Safflorite occurs with other arsenide minerals as an accessory in silver mining districts. It alters to the arsenate erythrite in the secondary environment.

References

Warr, L.N.. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine.
"Handbook of Mineralogy".
[http://www.mindat.org/show.php?id=3500&ld=1&pho= Safflorite on Mindat.org]
[http://webmineral.com/data/Safflorite.shtml Safflorite on Webmineral]

Info: Wikipedia Source

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cobalt-minerals iron-minerals arsenide-minerals orthorhombic-minerals minerals-in-space-group-58

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