Anapaite Explained

Anapaite
Category:Phosphate minerals
Formula:Ca2Fe2+(PO4)2·4H2O
Imasymbol:Anp[1]
Strunz:8.CH.10
System:Triclinic
Class:Pinacoidal
Symmetry:Triclinic
H-M symbol:
Space group: P
Unit Cell:a = 6.447, b = 6.816
c = 5.898 [Å]; α = 101.64°
β = 104.24°, γ = 70.76°; Z = 1
Color:Green, greenish white to colorless
Habit:Tabular to bladed crystals, radiating clusters, incrustations, fibrous, and in nodules
Cleavage:Perfect on, distinct on
Tenacity:Flexible
Mohs:3.5
Luster:Vitreous
Refractive:nα=1.602, nβ=1.613, nγ=1.649
Opticalprop:Biaxial (+)
Birefringence:δ = 0.047
Pleochroism:Not visible
2V:Measured: 52° to 56°
Streak:White
Gravity:2.8
Diaphaneity:Transparent
References:[2] [3] [4]

Anapaite is a calciumiron phosphate mineral with formula: Ca2Fe2+(PO4)2·4H2O. It is a mineral that typically occurs in cavities in fossil bearing sedimentary rocks. It is also found in phosphate bearing iron ores and rarely in pegmatites. It is commonly found with goethite, siderite and vivianite.[2]

It was named after the type locality on the Black Sea coastal region of Anapa, Taman Peninsula, Russia.[2] Noted localities include Kertch (Crimea, Ukraine), Bellver de Cerdanya (Lleida, Catalonia, Spain)[5] and Valdarno, Tuscany, Italy.

See also

Notes and References

  1. Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3 . 291–320. 10.1180/mgm.2021.43 . 2021MinM...85..291W . 235729616 . free.
  2. https://www.mindat.org/min-211.html Anapaite on Mindat.org
  3. http://www.webmineral.com/data/Anapaite.shtml Anapaite data on Webmineral.com
  4. http://rruff.geo.arizona.edu/doclib/hom/anapaite.pdf Anapaite in the Handbook of Mineralogy
  5. Book: Calvo, Miguel . Minerales y Minas de España. Vol. VII. Fosfatos, Arseniatos y Vanadatos. . Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo . 2015 . 319–321 . es.