Dovyrenite (original) (raw)

Hardness:

VHN10=108 - 165 kg/mm2 - Vickers

Comment:

Two distinct Vickers hardness groupings

Cleavage:

Perfect
A perfect cleavage on (010) and imperfect cleavages on (100), (001) and (140).

Fracture:

Irregular/Uneven, Step-Like

Density:

3.034 g/cm3 (Calculated)

Comment:

Could not be measured due to small crystal size.

Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 5.666 Å, b = 18.844 Å, c = 3.728 Å

Ratio:

a:b:c = 0.301 : 1 : 0.198

Unit Cell V:

398.04 ų (Calculated from Unit Cell)

Morphology:

Prismatic crystals flattened along [100], elongated along [001] and with an orthorhombic cross-section. Crystals are typically characterized by three simple forms: {100}, {140} and {081}?. The forms {010} and {410}? occur as narrow faces.

General Appearance of Type Material:

Xenomorphic crystals up to 100 µm, rare colorless crystals (< 300 µm long) and stellate growths, and as polycrystalline reaction rims (< 200–250 µm thick) on calzirtite.

Place of Conservation of Type Material:

Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia (#3545).

Geological Setting of Type Material:

Altered pyroxene and melilite-monticellite skarn in carbonate xenoliths in ultra-basic rocks. Secondary low temperature mineral.

Associated Minerals at Type Locality:

Reference:

Galuskin, E.V., Pertsev, N.N., Armbruster, T., Kadiyski, M., Zadov, A.E., Galuskina, I.O., Dzierzanowski, P., Wrzalik, R., Kislov, E.V. (2007) Dovyrenite Ca6Zr[Si2O7]2(OH)4 – A new mineral from skarned carbonate xenoliths in basic-ultrabasic rocks of the Ioko-Dovyren Massif, Northern Baikal Region, Russia. Mineralogia Polonica: 38: 15-27.