Kryzhanovskite
Current inventory: 0 gems
 

  
Kryzhanovskite was named to honor Vladimir Il’ich Kryzhanovskii (1881–1947), Russian mineralogist, Curator of the A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.

Discovered in 1950; IMA status: Valid (pre-IMA; Grandfathered)

Chemistry

Chemical Formula:

Mn²⁺Fe₂³⁺(PO₄)₂(OH)₂ • (H₂O)

Hydrated Manganese Iron Phosphate Hydroxide

Molecular Weight:

408.60 gm

Composition:

Manganese

13.45 %

Mn

17.36 %

MnO

Iron

27.34 %

Fe

39.08 %

Fe₂O₃

Phosphorus

15.16 %

P

34.74 %

P₂O₅

Hydrogen

0.99 %

H

8.82 %

H₂O

Oxygen

43.07 %

O

100.00 %

100.00 %

= TOTAL OXIDE

Classification

Mineral Classification:

Phosphates

Strunz 8th Ed. ID:

7/C.08-40

Nickel-Strunz 10th Ed. ID:

8.CC.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H₂O
C : With only medium-sized cations, RO₄:H₂O = 1:1.5

Related to:

Phosphoferrite Group. Garyansellite-Kryzhanovskite Series. Can be derived from Phosphoferrite by oxidation.

Members of Group:

Phosphoferrite Group: Correianevesite, Garyansellite, Kryzhanovskite, Landesite, Phosphoferrite, Reddingite 

Varieties:

None

Synonyms:

ICSD 303, Kruzhanovskite, Kryjanovskite, PDF 24-731

Crystal Data

Crystallography:

Orthorhombic - Dipyramidal

Crystal Habit:

Crystals are typically rough pseudo-octahedra, prismatic or as plates flattened on {010}, to 5 cm; may be granular. 

Twinning:

None

Physical Properties

Cleavage:

Perfect on {001}

Fracture:

Irregular/Uneven

Tenacity:

Brittle

Moh's Hardness:

3.5 - 4.0

Density:

3.31 (g/cm³)

Luminescence:

None

Radioactivity:

Not Radioactive

Optical Properties

Color:

Deep red-brown, dark blackish brown to light golden-brown, bronze on cleavage surfaces

Transparency:

Opaque to translucent

Luster:

Vitreous to dull

Refractive Index:

1.79 - 1.82  Biaxial ( + )

Birefringence:

0.030

Dispersion:

Strong; r < v or r > v

Pleochroism:

Strong; X = wine-yellow; Y = orange-brown; Z = reddish brown

Occurances

Geological Setting:

A rare low-temperature oxidation product of phosphate minerals in complex granite pegmatites and iron formations.

Common Associations:

Sicklerite, Triphylite (Kalba Range, Kazakhstan); Ferrisicklerite, Triphylite (Clementine II pegmatite, Namibia); Garyansellite, Ludlamite, Arrojadite, Vivianite, Metavivianite, Souzalite, Quartz (Rapid Creek, Canada)

Common Impurities:

None

Type Locality:

Ak-Kezen' pegmatite, Belogorskii Town, Kalba Range, Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast'), Kazakhstan

Year Discovered:

1950

View mineral photos:

Kryzhanovskite Mineral Photos and Locations

More Information

Mindat.org
Webmineral.com

Kryzhanovskite is a rare phophate mineral that is a member of the Phosphoferrite Group of minerals. Crystals are typically opaque to translucent, deep red-brown, dark blackish brown to light golden-brown, with a vitreous to dull luster and Moh's hardness of 3.5 - 4. Kryzhanovskite was discovered at the Ak-Kezen' pegmatite, Belogorskii Town, Kalba Range, Eastern Kazakhstan Province, Kazakhstan and named to honor Vladimir Il’ich Kryzhanovskii (1881–1947), Russian mineralogist, Curator of the A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia. The picture above shows a dark blackish brown faceted gem from the east side of Rapid Creek, one km north of Lake Creek, Yukon Territory, Canada.

Kryzhanovskite distribution: from [the Ak-Kezen’ pegmatites,] near Belogorskii, Kalba Range, Kazakhstan. Abundant at the Clementine II pegmatite, Okatjimukuju farm, near Karibib, Namibia. Large crystals on the east side of Rapid Creek, one km north of Lake Creek, Yukon Territory, Canada. In the USA, in South Dakota, from the Bull Moose, Dan Patch, and Ferguson mines, near Keystone, and the Big Chief mine, one km south of Glendale, Pennington County; from the Tip Top mine, 8.5 km southwest of Custer, Custer County; in the Palermo #1 mine, near North Groton, Grafton County, New Hampshire. At Hagendorf, Bavaria, Germany. From the Bendada pegmatite, near Guarda, and in the Mangualde pegmatite, near Mesquitela, Portugal. From the Pinilla de Fermoselle pegmatite, Zamora, Spain.
 

  
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