Fe2+ SO4 • 4H2 O

Rozenitec 2001-2005 Mineral Data Publishing, version 1

Crystal Data: Monoclinic. Point Group: 2/m. As cottonball-like concretions and nodules;
most commonly as powdery efflorescences or coatings on melanterite.
Physical Properties:
Hardness = [2–3] (by analogy to rozenite group members).
D(meas.) = 2.293 (synthetic). D(calc.) = 2.29 Soluble in H2 O.
Optical Properties: Semitransparent. Color: Colorless, white, pale green. Streak: White.
Luster: Vitreous.
Optical Class: Biaxial (–). α = 1.527 β = 1.536 γ = 1.541–1.543 (γ 0 ) 2V(meas.) = ∼90◦
Cell Data: Space Group: P 21 /n (synthetic).
β = 90◦ 26(10)0 Z = 4

a = 5.979(4)b = 13.648(4)c = 7.977(3)

X-ray Powder Pattern: Manitoba, Canada.
4.47 (10), 5.46 (9), 4.47 (7), 3.40 (6), 6.85 (5), 3.22 (5), 2.953 (5)Chemistry:SO3
Fe2 O3FeO
MnO
MgO
H2 O

(1)
36.29
31.13
0.06
0.97
32.98

(2)
35.91
0.80
30.65

(3)
35.75

31.90

32.17

32.08

Total
[101.43]
99.26
100.00(1) Staszic mine, Poland; original total given as 100.43%, corresponds to Fe1.01 S0.99 O4 • 3.97H2 O.
(2) Manitoba, Canada; corresponds to Fe0.98 S1.02 O4 • 4.02H2 O. (3) FeSO4 • 4H2 O.
Mineral Group:Rozenite group.

Occurrence: An uncommon secondary mineral, formed at or below 21 ◦ C and under low
humidity directly from copper-free melanterite, in turn an alteration product of pyrite or
marcasite; commonly a post-mining product, in lake-bed sediments, or coal seams.
Association:

Melanterite, epsomite, jarosite, gypsum, sulfur, pyrite, marcasite, “limonite”.

Distribution: In Poland, from Mt. Ornak, Tatra Mountains, and in the Staszic pyrite mine,Rudki. From the Voras Mountains, 17 km north-northwest of Ardéa, Greece. At Alšar (Allchar),near Rošden, Macedonia. In the Cetine mine, near Rosia, Tuscany, Italy. From Bleiberg,Carinthia, Austria. At Ramsbeck, North Rhine-Westphalia, Germany. In England, from theOughterside coal mine, near Aspatria, Cumbria. In Scotland, at Slateford, near Edinburgh, fromthe West Mains coal mine, West Calder; and in the Howcommon limestone mine, Kilmarnock.
In Canada, in Twp. 24, R28, west of 1st meridian, Manitoba; at the Spatsum claim, south of
Ashcroft Manor, British Columbia; in the Dundas quarry, Dundas, Ontario. In the USA, fromBisbee, Cochise Co., Arizona; in the Kalkar quarry, Santa Cruz, Santa Cruz Co., California; at theGoldstrike mine, Lynn district, Humboldt Co., and other localities in Nevada. At Navarana fjord,
Freuchen Land, Greenland. From Paddy’s River mine, Australian Capital Territory. Additionallocalities are known.
Name: To honor Zygmunt Rozen (1874–1936), mineralogist and petrographer, Academy ofMining and Metallurgy, Kraców, Poland.
Type Material:

Academy of Mining and Metallurgy, Kraców, Poland.

References: (1) Kubisz, J. (1960) Rozenite, FeSO4 • 4H2 O, a new mineral. Bull. acad. polonaise
sci., Ser. sci. geol. geogr., 8, 97–113 (in English). (2) (1961) Amer. Mineral., 46, 242–243 (abs.
ref. 1). (3) Jambor, J.L. and R.J. Traill (1963) On rozenite and siderotil. Can. Mineral., 7,751–763. (4) Baur, W.H. (1962) Zur Kristallchemie der Salzhydrate. Die Kristallstrukturen vonMgSO4 .4H2 O (Leonhardtit) und FeSO4 .4H2 O. Acta Cryst., 15, 815–826 (in German with Englishabs.).
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