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Schreibersite

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Karl Franz Anton von Schreibers
Formula:
(Fe,Ni,Cr)3P
System:
Tetragonal
Colour:
Silver-white to ...
Lustre:
Metallic
Hardness:
6½ - 7
Name:
Named in 1847 by Wilhelm Karl Ritter von Haidinger in honor of Karl Franz Anton von Schreibers (15 August 1775 – 21 May 1852) of Bratislava, Slovakia (which at the time was known as Pressburg, Hungary, Habsburg Empire).

He earned his medical doctorate from Vienna in 1798 but also studied botany, mineralogy, and zoology at the University. For a brief period of time, he assisted his uncle, Joseph Ludwig von Schreibers, with his medical practice in Vienna. As a young man, he also toured museums throughout Europe. In 1802 he was an assistant of natural history and agricultural sciences at the University of Vienna. In 1806 he was appointed the director of the Viennese natural history collections (Naturalienkabinette), which became his life's work.

Schreibers was involved with all aspects of natural sciences, and he embarked upon a total organizational overhaul of the museum's natural history collections. During his time as director, the size of the museum's library grew from a few scientific books to a collection of over 30,000 volumes. Here, he stored the results of his personal research work, as well as a collection of meteorites — Schreibers' main interest of study. On 31 October 1848, most of the museum was destroyed by fire during the course of the bombardment of Viennese revolutionaries by the Austrian Imperial Army. Schreibers was devastated by the loss and retired soon afterward. Fortunately, his collection of meteorites was saved from destruction.
Recently suggested by Pasek (2016) as a potentially important prebiotic mineral of the early Earth, possibly standing for a reactive source of phosphorus and a precursor to some phosphorylated molecules. The mineral is estimated to stand for 1-10% of the total crustal phosphorus during the Hadean.


Classification of Schreibersite

Approved, 'Grandfathered' (first described prior to 1959)
1.BD.05

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides and Phosphides
D : Phosphides
Dana 7th ed.:
1.1.31.2
1.1.21.2

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
2.14

2 : Carbides, Nitrides, Silicides and Phosphides

Physical Properties of Schreibersite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Silver-white to tin-white, tarnishes to brass yellow or brown
Hardness (Mohs):
6½ - 7
Tenacity:
Very brittle
Cleavage:
Perfect
Perfect on {001}
imperfect on {010} or {110}
Density:
7.0 - 7.3 g/cm3 (Measured)    7.28(16) g/cm3 (Calculated)

Optical Data of Schreibersite

Type:
Uniaxial

Chemical Properties of Schreibersite

IMA Formula:
(Fe,Ni,Cr)3P
Elements listed in formula:
Common Impurities:
Cr

Crystallography of Schreibersite

Crystal System:
Tetragonal
Class (H-M):
4 - Disphenoidal
Space Group:
I4
Cell Parameters:
a = 9.05 Å, c = 4.47 Å
Ratio:
a:c = 1 : 0.494
Unit Cell Volume:
V 366.10 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Rarely in crystals, hoppered, plates, tablets, rods or needles.

Occurrences of Schreibersite

Type Occurrence of Schreibersite

Relationship of Schreibersite to other Species

Common Associates:
1.BD.ZuktamruriteFeP2
1.BD.05NickelphosphideNi3P
1.BD.10Barringerite(Fe,Ni)2P
1.BD.10MonipiteMoNiP
1.BD.15FlorenskyiteFeTiP
1.BD.15Allabogdanite(Fe,Ni)2P
1.BD.15AndreyivanoviteFeCrP
1.BD.20Melliniite(Ni,Fe)4P
2.1MoissaniteSiC
2.2SinoiteSi2N2O
2.3OsborniteTiN
2.4TongbaiteCr3C2
2.5CarlsbergiteCrN
2.6SiderazotFeNx (x=0.25-0.5)
2.7GupeiiteFe3Si
2.8XifengiteFe5Si3
2.9Khamrabaevite(Ti,V,Fe)C
2.10Haxonite(Fe,Ni)23C6
2.11CoheniteFe3C
2.12Roaldite(Fe,Ni)4N
2.13SuessiteFe3Si
2.15Barringerite(Fe,Ni)2P
2.16Perryite(Ni,Fe)8(Si,P)3
1.1.31.1Barringerite(Fe,Ni)2P
1.1.31.3NickelphosphideNi3P
1.1.31.4Melliniite(Ni,Fe)4P

Other Names for Schreibersite

Other Information

Other Information:
Strongly magnetic
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Schreibersite in petrology

Accessory component of (items highlighted in red)

References for Schreibersite

Reference List:
Palache, Charles, Harry Berman & Clifford Frondel (1944) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I: 124-126.

Geochemica et Cosmochimica Acta: 28: 971-980.

Geochemica et Cosmochimica Acta: 29: 513-534.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1982) 111: 685.

Skála, R. and Císařová, I. (2005) Crystal structure of meteoritic schreibersites: determination of absolute structure: Physics and Chemistry of Minerals: 31: 721-732.

Pasek, M.A. (2016): Schreibersite on the early earth: scenarios for prebiotic phosphorylation. Geoscience Frontiers: 7: (in press); http://forum.amiminerals.it/viewtopic.php?f=5&t=12877 (2016)

Internet Links for Schreibersite

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Localities for Schreibersite

Mineral and/or Locality  
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