You Searched For: Properties+of+Matter
266 results were found
Anothoclase
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Anorthoclase (Na, K) AlSi3 O8 (Feldspar Group) Crystallography:
Triclinic; 1. Twinning common. Physical Properties:
Cleavage: Principle cleavage at right angles or very close to 90°. Fracture uneven; brittle. ...
Magnetite
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Magnetite Fe+2Fe2+3O4 (Spinel Group) Crystallography:
Isometric; 4/m32/m. Frequently in octahedral crystals; rarely dodecahedral. Commonly coarse-to fine-grained granular, massive.
Physical Properties: Cleavag...
Hornblende
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Hornblende (Ca,Na)2-3 (Mg,Fe,Al)5 SI6 (Si,Al)2 O22 (OH)2 (Amphibole Group) Crystallography:
Monoclinic: 2/m. Crystals prismatic usually terminated by {011}. May be columnar to fibrous; coarse-to fine-granular.
Physical Pro...
Biotite
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Biotite K (Mg, Fe+2)3 (Al, Fe+3) Si3 O10 (OH,F)2 (Mica Group) Crystallography: Monoclinic; 2/m. Usually in irregular foliated masses, and rarely in tabular or short prismatic crystals. Physical Properties:
Cle...
Graphite
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Graphite C Crystallography:
Hexagonal; 6/m2/m2/m. Usually in foliated or scaly masses, but may be radiated or granular. Crystals tabular, of hexagonal outline with prominent basal plane.
Physical Properties: C...
Albite
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Albite NaAlSi3O8 (An0-10) (Feldspar Group) (see also Plagioclase) Crystallography:
Triclinic; 1. Crystals commonly tabular parallel to {010}; sometimes elongated on b. Twinning and striations common. Often as ...
Cinnabar
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Cinnabar HgS Crystallography:
Hexagonal-R; 32 (low temperature form). Crystals usually rhombohedral, often in penetration twins. Commonly fine granular, massive; also earthy.
Physical Properties: Cleavage: {10...
Pyrrhotite
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Pyrrhotite Fe1-xS (x = 0 - 0.17) Crystallography:
Monoclinic; 2/m (below about 250°C). Hexagonal; 6/m3/m2/m for high tempera- ture forms. Crystals rare, usually tabular to platy on {0001}. Also massive, granular.
Physical ...
Azurite
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Azurite Cu3 (CO3)2 (OH)2 Crystallography:
Monoclinic; 2/m. Habit varies; crystals commonly complex and malformed. Also massive.
Physical Properties: Cleavage: {011} perfect, {100} fair. Fracture conchoidal, br...
Anorthite
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Anorthite CaAl2Si2O8(An90-100) (Feldspar Group) (see also Plagioclase) Crystallography:
Triclinic; 1. Crystals usually prismatic parallel to c-axis; twinning as in albite. Commonly massive, cleavable, with gra...
Ilmenite
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Ilmenite Fe+2 Ti O3 Crystallography:
Hexagonal-R; 3. Crystals usually thick tabular with prominent basal planes and small rhombohedral truncations. Commonly in thin plates, massive or compact; also in grains o...
Malachite
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Malachite Cu2 (CO3) (OH)2 Crystallography:
Monoclinic; 2/m. Rarely in distinct crystals; usually prismatic or fine acicular. Commonly in radiating fibers forming botryoidal or stalactitic masses. Also granular...
Actinolite
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Actinolite Ca2 (Mg, Fe+2)5 Si8O22(OH)2 (Amphibole Group) Crystallography:
Monoclinic; 2/m. Crystals usually prismatic; columnar or fibrous. Also massive or granular.
Physical Properties: Cleavage: {110} perfec...
Corundum
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Corundum Al2O3 Crystallography:
Hexagonal-R; 32/m. Crystals commonly tabular on {0001} or prismatic {1120}; often rude barrel-shaped crystals. Usually massive; coarse or fine granular.
Physical Properties: Cle...
Bornite
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Bornite (Na,K) AlSi3 O8 (Feldspar Group) Crystallography:
Orthorhombic - dipyramidal (2/m 2/m 2/m) Crystals rare; commonly massive. Physical Properties:
Cleavage: None. Fracture small conchoidal, uneven; britt...
Topaz
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Topaz Al2SiO4 (F,OH)2 Crystallography:
Orthorhombic; 2/m2/m2/m. Crystals commonly prismatic with vertical prism faces often striated; also in crystalline masses or granular.
Physical Properties: Cleavage: {001} perfect. Fr...
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