Mineralape
Johannite
Robert M. Lavinsky·CC BY-SA 3.0·Wikimedia

Johannite

Cu(UO2)2(SO4)2(OH)2·8H2O
Triclinic heart IMA grandfathered

Johannite is a rare secondary mineral composed of copper, uranyl, sulfate, hydroxide, and water. Its chemical formula is Cu(UO2)2(SO4)2(OH)2·8H2O, indicating it is a hydrated copper uranyl sulfate hydroxide. It crystallizes in the triclinic system and is characterized by a very low Mohs hardness of 2, a relatively low density, and a vitreous to dull luster. It typically appears as a green or yellowish-green mineral. Johannite is classified under the Strunz system as 7.EB.05, which denotes its position among the sulfate minerals.

Durezza Mohs2 (graffiata dall'unghia)
1. Talco
2. Gesso
3. Calcite
4. Fluorite
5. Apatite
6. Ortoclasio
7. Quarzo
8. Topazio
9. Corindone
10. Diamante
135710
Più duro di talco (1)

Composition

Composizione (% in peso)
U
O
S
Cu
  • UUranium48.9%
  • OOxygen36.1%
  • SSulfur6.6%
  • CuCopper6.5%
  • HHydrogen1.9%

Overview

Johannite is a rare secondary mineral composed of copper, uranyl, sulfate, hydroxide, and water. Its chemical formula is Cu(UO2)2(SO4)2(OH)2·8H2O, indicating it is a hydrated copper uranyl sulfate hydroxide. It crystallizes in the triclinic system and is characterized by a very low Mohs hardness of 2, a relatively low density, and a vitreous to dull luster. It typically appears as a green or yellowish-green mineral. Johannite is classified under the Strunz system as 7.EB.05, which denotes its position among the sulfate minerals.

Etymology

Johannite is named after Archduke John of Austria, a historical figure. The mineral's name honors him, though no specific discovery year is provided in the facts.

Spiritual meaning and crystal therapy

Spiritual meaning

Johannite is traditionally believed to carry a unique spiritual energy, often associated with transformation and deep introspection. It is thought to encourage spiritual growth and a greater connection to one's inner truth.

Esoteric properties

Johannite is said to support emotional healing and enhance intuition. It is believed to help release old patterns and foster a sense of inner clarity and balance.

Associated chakra

Johannite is traditionally linked to the heart chakra due to its greenish hues and its association with emotional healing and compassion.

Crystal therapy use

In crystal therapy, johannite is often used in meditation or placed near the heart chakra. It may also be worn as jewelry or carried to promote emotional harmony and spiritual insight.

Information on crystal therapy is provided for cultural and traditional purposes only. It does not replace medical advice or treatment. Always consult a doctor for health issues.